0.8.11claws12
[claws.git] / src / imap.c
index 835e66c03a4747e17fe7ac679b997cd3f5e54e99..5eb74f23949b8b9c56d34c96e9c27508b1d4001a 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2002 Hiroyuki Yamamoto
+ * Copyright (C) 1999-2003 Hiroyuki Yamamoto
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -31,8 +31,8 @@
 #include <unistd.h>
 #include <ctype.h>
 #include <time.h>
-#if HAVE_LIBJCONV
-#  include <jconv.h>
+#if HAVE_ICONV
+#  include <iconv.h>
 #endif
 
 #include "intl.h"
 #include "procmsg.h"
 #include "procheader.h"
 #include "folder.h"
-#include "statusbar.h"
 #include "prefs_account.h"
 #include "codeconv.h"
 #include "utils.h"
 #include "inputdialog.h"
+#include "log.h"
 
 #define IMAP4_PORT     143
-#if USE_SSL
+#if USE_OPENSSL
 #define IMAPS_PORT     993
 #endif
 
        }                                                       \
 }
 
+struct _IMAPFolderItem
+{
+       FolderItem item;
+
+       guint lastuid;
+       guint uid_next;
+       GSList *uid_list;
+};
+
 static GList *session_list = NULL;
 
 static gint imap_cmd_count = 0;
@@ -77,12 +86,18 @@ static void imap_folder_init                (Folder         *folder,
                                         const gchar    *name,
                                         const gchar    *path);
 
+static FolderItem *imap_folder_item_new        (Folder         *folder);
+static void imap_folder_item_destroy   (Folder         *folder,
+                                        FolderItem     *item);
+
 static IMAPSession *imap_session_get   (Folder         *folder);
 
 static gint imap_scan_tree_recursive   (IMAPSession    *session,
                                         FolderItem     *item);
-static GSList *imap_parse_list         (IMAPSession    *session,
-                                        const gchar    *real_path);
+static GSList *imap_parse_list         (Folder         *folder,
+                                        IMAPSession    *session,
+                                        const gchar    *real_path,
+                                        gchar          *separator);
 
 static void imap_create_missing_folders        (Folder                 *folder);
 static FolderItem *imap_create_special_folder
@@ -94,34 +109,42 @@ static gint imap_do_copy           (Folder         *folder,
                                         FolderItem     *dest,
                                         MsgInfo        *msginfo,
                                         gboolean        remove_source);
+#if 0
 static gint imap_do_copy_msgs_with_dest        (Folder         *folder,
                                         FolderItem     *dest, 
                                         GSList         *msglist,
                                         gboolean        remove_source);
+#endif
 
 static GSList *imap_get_uncached_messages      (IMAPSession    *session,
                                                 FolderItem     *item,
                                                 guint32         first_uid,
                                                 guint32         last_uid);
-static GSList *imap_delete_cached_messages     (GSList         *mlist,
-                                                FolderItem     *item,
-                                                guint32         first_uid,
-                                                guint32         last_uid);
 static void imap_delete_all_cached_messages    (FolderItem     *item);
 
-#if USE_SSL
+#if USE_OPENSSL
 static SockInfo *imap_open             (const gchar    *server,
                                         gushort         port,
-                                        gboolean        use_ssl);
+                                        SSLType         ssl_type);
 #else
 static SockInfo *imap_open             (const gchar    *server,
                                         gushort         port);
 #endif
 
+#if USE_OPENSSL
+static SockInfo *imap_open_tunnel(const gchar *server,
+                                 const gchar *tunnelcmd,
+                                 SSLType ssl_type);
+#else
 static SockInfo *imap_open_tunnel(const gchar *server,
                                  const gchar *tunnelcmd);
+#endif
 
+#if USE_OPENSSL
+static SockInfo *imap_init_sock(SockInfo *sock, SSLType         ssl_type);
+#else
 static SockInfo *imap_init_sock(SockInfo *sock);
+#endif
 
 static gint imap_set_message_flags     (IMAPSession    *session,
                                         guint32         first_uid,
@@ -135,9 +158,6 @@ static gint imap_select                     (IMAPSession    *session,
                                         gint           *recent,
                                         gint           *unseen,
                                         guint32        *uid_validity);
-static gint imap_get_uid               (IMAPSession    *session,
-                                        gint            msgnum,
-                                        guint32        *uid);
 static gint imap_status                        (IMAPSession    *session,
                                         IMAPFolder     *folder,
                                         const gchar    *path,
@@ -149,6 +169,8 @@ static gint imap_status                     (IMAPSession    *session,
 
 static void imap_parse_namespace               (IMAPSession    *session,
                                                 IMAPFolder     *folder);
+static void imap_get_namespace_by_list         (IMAPSession    *session,
+                                                IMAPFolder     *folder);
 static IMAPNameSpace *imap_find_namespace      (IMAPFolder     *folder,
                                                 const gchar    *path);
 static gchar imap_get_path_separator           (IMAPFolder     *folder,
@@ -161,21 +183,15 @@ static gchar *imap_parse_atom             (SockInfo       *sock,
                                         gchar          *dest,
                                         gint            dest_len,
                                         GString        *str);
-static gchar *imap_parse_one_address   (SockInfo       *sock,
-                                        gchar          *start,
-                                        gchar          *out_from_str,
-                                        gchar          *out_fromname_str,
-                                        GString        *str);
-static gchar *imap_parse_address       (SockInfo       *sock,
-                                        gchar          *start,
-                                        gchar         **out_from_str,
-                                        gchar         **out_fromname_str,
-                                        GString        *str);
 static MsgFlags imap_parse_flags       (const gchar    *flag_str);
 static MsgInfo *imap_parse_envelope    (SockInfo       *sock,
+                                        FolderItem     *item,
                                         GString        *line_str);
-static gint imap_greeting              (SockInfo *sock,
-                                        gboolean *is_preauth);
+static gint imap_greeting              (SockInfo       *sock,
+                                        gboolean       *is_preauth);
+static void imap_get_capability                (Session        *session);
+static gboolean imap_has_capability    (IMAPSession    *session,
+                                        const gchar    *cap);
 
 /* low-level IMAP4rev1 commands */
 static gint imap_cmd_login     (SockInfo       *sock,
@@ -183,6 +199,7 @@ static gint imap_cmd_login  (SockInfo       *sock,
                                 const gchar    *pass);
 static gint imap_cmd_logout    (SockInfo       *sock);
 static gint imap_cmd_noop      (SockInfo       *sock);
+static gint imap_cmd_starttls  (SockInfo       *sock);
 static gint imap_cmd_namespace (SockInfo       *sock,
                                 gchar         **ns_str);
 static gint imap_cmd_list      (SockInfo       *sock,
@@ -228,9 +245,10 @@ static gint imap_cmd_fetch (SockInfo       *sock,
 static gint imap_cmd_append    (SockInfo       *sock,
                                 const gchar    *destfolder,
                                 const gchar    *file);
-static gint imap_cmd_copy      (SockInfo       *sock,
-                                guint32         uid,
-                                const gchar    *destfolder);
+static gint imap_cmd_copy      (IMAPSession    *session,
+                                gint32         msgnum,
+                                const gchar    *destfolder,
+                                gint32         *new_uid);
 static gint imap_cmd_store     (SockInfo       *sock,
                                 guint32         first_uid,
                                 guint32         last_uid,
@@ -242,8 +260,7 @@ static gint imap_cmd_ok             (SockInfo       *sock,
 static void imap_cmd_gen_send  (SockInfo       *sock,
                                 const gchar    *format, ...);
 static gint imap_cmd_gen_recv  (SockInfo       *sock,
-                                gchar          *buf,
-                                gint            size);
+                                gchar         **buf);
 
 /* misc utility functions */
 static gchar *strchr_cpy                       (const gchar    *src,
@@ -255,11 +272,9 @@ static gchar *get_quoted                   (const gchar    *src,
                                                 gchar          *dest,
                                                 gint            len);
 static gchar *search_array_contain_str         (GPtrArray      *array,
-                                                gchar          *str);
+                                                const gchar    *str);
 static gchar *search_array_str                 (GPtrArray      *array,
-                                                gchar          *str);
-static gchar *search_array_starts              (GPtrArray *array,
-                                                const gchar *str);
+                                                const gchar    *str);
 static void imap_path_separator_subst          (gchar          *str,
                                                 gchar           separator);
 
@@ -268,77 +283,180 @@ static gchar *imap_locale_to_modified_utf7       (const gchar    *from);
 
 static gboolean imap_rename_folder_func                (GNode          *node,
                                                 gpointer        data);
-
+gint imap_get_num_list                         (Folder         *folder,
+                                                FolderItem     *item,
+                                                GSList        **list);
+GSList *imap_get_msginfos                      (Folder         *folder,
+                                                FolderItem     *item,
+                                                GSList         *msgnum_list);
+MsgInfo *imap_get_msginfo                      (Folder         *folder,
+                                                FolderItem     *item,
+                                                gint            num);
+gboolean imap_check_msgnum_validity            (Folder         *folder,
+                                                FolderItem     *item);
+
+FolderClass imap_class =
+{
+       F_IMAP,
+       "imap",
+       "IMAP4",
+
+       /* Folder functions */
+       imap_folder_new,
+       imap_folder_destroy,
+       imap_scan_tree,
+       imap_create_tree,
+
+       /* FolderItem functions */
+       imap_folder_item_new,
+       imap_folder_item_destroy,
+       imap_create_folder,
+       imap_rename_folder,
+       imap_remove_folder,
+       imap_get_num_list,
+       NULL,
+       NULL,
+       NULL,
+       imap_check_msgnum_validity,
+
+       /* Message functions */
+       imap_get_msginfo,
+       imap_get_msginfos,
+       imap_fetch_msg,
+       imap_add_msg,
+       imap_move_msg,
+       NULL,
+       imap_copy_msg,
+       NULL,
+       imap_remove_msg,
+       imap_remove_msgs,
+       imap_remove_all_msg,
+       imap_is_msg_changed,
+       NULL,
+};
+
+FolderClass *imap_get_class()
+{
+       return &imap_class;
+}
 
 Folder *imap_folder_new(const gchar *name, const gchar *path)
 {
        Folder *folder;
 
        folder = (Folder *)g_new0(IMAPFolder, 1);
+       folder->class = &imap_class;
        imap_folder_init(folder, name, path);
 
        return folder;
 }
 
-void imap_folder_destroy(IMAPFolder *folder)
+void imap_folder_destroy(Folder *folder)
 {
+       gchar *dir;
+
+       dir = folder_get_path(folder);
+       if (is_dir_exist(dir))
+               remove_dir_recursive(dir);
+       g_free(dir);
+
        folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 }
 
 static void imap_folder_init(Folder *folder, const gchar *name,
                             const gchar *path)
 {
-       folder_remote_folder_init(folder, name, path);
+       folder_remote_folder_init((Folder *)folder, name, path);
+}
+
+static FolderItem *imap_folder_item_new(Folder *folder)
+{
+       IMAPFolderItem *item;
+       
+       item = g_new0(IMAPFolderItem, 1);
+       item->lastuid = 0;
+       item->uid_next = 0;
+       item->uid_list = NULL;
+
+       return (FolderItem *)item;
+}
+
+static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
+{
+       IMAPFolderItem *item = (IMAPFolderItem *)_item;
+
+       g_return_if_fail(item != NULL);
+       g_slist_free(item->uid_list);
+
+       g_free(_item);
+}
 
-       folder->type = F_IMAP;
+static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
+{
+       IMAPFolderItem *item = (IMAPFolderItem *)node->data;
+       
+       item->lastuid = 0;
+       item->uid_next = 0;
+       g_slist_free(item->uid_list);
+       item->uid_list = NULL;
+       
+       return FALSE;
+}
 
-       folder->get_msg_list        = imap_get_msg_list;
-       folder->fetch_msg           = imap_fetch_msg;
-       folder->add_msg             = imap_add_msg;
-       folder->move_msg            = imap_move_msg;
-       folder->move_msgs_with_dest = imap_move_msgs_with_dest;
-       folder->copy_msg            = imap_copy_msg;
-       folder->copy_msgs_with_dest = imap_copy_msgs_with_dest;
-       folder->remove_msg          = imap_remove_msg;
-       folder->remove_all_msg      = imap_remove_all_msg;
-       folder->is_msg_changed      = imap_is_msg_changed;
-       folder->scan                = imap_scan_folder;
-       folder->scan_tree           = imap_scan_tree;
-       folder->create_tree         = imap_create_tree;
-       folder->create_folder       = imap_create_folder;
-       folder->rename_folder       = imap_rename_folder;
-       folder->remove_folder       = imap_remove_folder;
+static void imap_reset_uid_lists(Folder *folder)
+{
+       if(folder->node == NULL)
+               return;
+       
+       /* Destroy all uid lists and rest last uid */
+       g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL); 
 }
 
 static IMAPSession *imap_session_get(Folder *folder)
 {
        RemoteFolder *rfolder = REMOTE_FOLDER(folder);
+       Session *session = NULL;
        gushort port;
 
        g_return_val_if_fail(folder != NULL, NULL);
-       g_return_val_if_fail(folder->type == F_IMAP, NULL);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
        g_return_val_if_fail(folder->account != NULL, NULL);
 
-#if USE_SSL
+#if USE_OPENSSL
        port = folder->account->set_imapport ? folder->account->imapport
-               : folder->account->ssl_imap ? IMAPS_PORT : IMAP4_PORT;
+               : folder->account->ssl_imap == SSL_TUNNEL
+               ? IMAPS_PORT : IMAP4_PORT;
 #else
        port = folder->account->set_imapport ? folder->account->imapport
                : IMAP4_PORT;
 #endif
 
-       if (!rfolder->session) {
-               rfolder->session =
-                       imap_session_new(folder->account);
-               if (rfolder->session) {
-                       imap_parse_namespace(IMAP_SESSION(rfolder->session),
-                                            IMAP_FOLDER(folder));
-                       rfolder->session->last_access_time = time(NULL);
-               }
-               statusbar_pop_all();
-               return IMAP_SESSION(rfolder->session);
+       /* Make sure we have a session */
+       if (rfolder->session != NULL) {
+               session = rfolder->session;
+       } else {
+               imap_reset_uid_lists(folder);
+               session = imap_session_new(folder->account);
+       }
+       if(session == NULL)
+               return NULL;
+
+       /* Get CAPABILITY */
+       imap_get_capability(session); 
+
+       /* Make sure session is authenticated */
+       if (!IMAP_SESSION(session)->authenticated)
+               imap_session_authenticate(IMAP_SESSION(session), folder->account);
+       if (!IMAP_SESSION(session)->authenticated) {
+               session_destroy(session);
+               rfolder->session = NULL;
+               return NULL;
        }
 
+       /* Make sure we have parsed the IMAP namespace */
+       imap_parse_namespace(IMAP_SESSION(session),
+                            IMAP_FOLDER(folder));
+
        /* I think the point of this code is to avoid sending a
         * keepalive if we've used the session recently and therefore
         * think it's still alive.  Unfortunately, most of the code
@@ -347,28 +465,36 @@ static IMAPSession *imap_session_get(Folder *folder)
         * A better solution than sending a NOOP every time would be
         * for every command to be prepared to retry until it is
         * successfully sent. -- mbp */
-       if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
-               rfolder->session->last_access_time = time(NULL);
-               statusbar_pop_all();
-               return IMAP_SESSION(rfolder->session);
+       if (time(NULL) - session->last_access_time > SESSION_TIMEOUT) {
+               /* verify that the session is still alive */
+               if (imap_cmd_noop(session->sock) != IMAP_SUCCESS) {
+                       /* Check if this is the first try to establish a
+                          connection, if yes we don't try to reconnect */
+                       if (rfolder->session == NULL) {
+                               log_warning(_("Connecting %s:%d failed"),
+                                           folder->account->recv_server, port);
+                               session_destroy(session);
+                               session = NULL;
+                       } else {
+                               log_warning(_("IMAP4 connection to %s:%d has been"
+                                             " disconnected. Reconnecting...\n"),
+                                           folder->account->recv_server, port);
+                               session_destroy(session);
+                               /* Clear folders session to make imap_session_get create
+                                  a new session, because of rfolder->session == NULL
+                                  it will not try to reconnect again and so avoid an
+                                  endless loop */
+                               rfolder->session = NULL;
+                               session = SESSION(imap_session_get(folder));
+                       }
+               }
        }
 
-       if (imap_cmd_noop(rfolder->session->sock) != IMAP_SUCCESS) {
-               log_warning(_("IMAP4 connection to %s:%d has been"
-                             " disconnected. Reconnecting...\n"),
-                           folder->account->recv_server, port);
-               session_destroy(rfolder->session);
-               rfolder->session =
-                       imap_session_new(folder->account);
-               if (rfolder->session)
-                       imap_parse_namespace(IMAP_SESSION(rfolder->session),
-                                            IMAP_FOLDER(folder));
+       rfolder->session = session;
+       if (session) {
+               session->last_access_time = time(NULL);
        }
-
-       if (rfolder->session)
-               rfolder->session->last_access_time = time(NULL);
-       statusbar_pop_all();
-       return IMAP_SESSION(rfolder->session);
+       return IMAP_SESSION(session);
 }
 
 Session *imap_session_new(const PrefsAccount *account)
@@ -376,16 +502,15 @@ Session *imap_session_new(const PrefsAccount *account)
        IMAPSession *session;
        SockInfo *imap_sock;
        gushort port;
-       gchar *pass;
        gboolean is_preauth;
 
-#ifdef USE_SSL
+#ifdef USE_OPENSSL
        /* FIXME: IMAP over SSL only... */ 
-       gboolean use_ssl;
+       SSLType ssl_type;
 
        port = account->set_imapport ? account->imapport
-               : account->ssl_imap ? IMAPS_PORT : IMAP4_PORT;
-       use_ssl = account->ssl_imap ? TRUE : FALSE;     
+               : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
+       ssl_type = account->ssl_imap;   
 #else
        port = account->set_imapport ? account->imapport
                : IMAP4_PORT;
@@ -393,8 +518,14 @@ Session *imap_session_new(const PrefsAccount *account)
 
        if (account->set_tunnelcmd) {
                log_message(_("creating tunneled IMAP4 connection\n"));
+#if USE_OPENSSL
+               if ((imap_sock = imap_open_tunnel(account->recv_server, 
+                                                 account->tunnelcmd,
+                                                 ssl_type)) == NULL)
+#else
                if ((imap_sock = imap_open_tunnel(account->recv_server, 
                                                  account->tunnelcmd)) == NULL)
+#endif
                        return NULL;
        } else {
                g_return_val_if_fail(account->recv_server != NULL, NULL);
@@ -402,9 +533,9 @@ Session *imap_session_new(const PrefsAccount *account)
                log_message(_("creating IMAP4 connection to %s:%d ...\n"),
                            account->recv_server, port);
                
-#if USE_SSL
+#if USE_OPENSSL
                if ((imap_sock = imap_open(account->recv_server, port,
-                                          use_ssl)) == NULL)
+                                          ssl_type)) == NULL)
 #else
                if ((imap_sock = imap_open(account->recv_server, port)) == NULL)
 #endif
@@ -412,28 +543,12 @@ Session *imap_session_new(const PrefsAccount *account)
        }
 
        /* Only need to log in if the connection was not PREAUTH */
-       imap_greeting(imap_sock, &is_preauth);
+       if (imap_greeting(imap_sock, &is_preauth) != IMAP_SUCCESS) {
+               sock_close(imap_sock);
+               return NULL;
+       }
        log_message("IMAP connection is %s-authenticated\n",
                    (is_preauth) ? "pre" : "un");
-       if (!is_preauth) {
-               g_return_val_if_fail(account->userid != NULL, NULL);
-
-               pass = account->passwd;
-               if (!pass) {
-                       gchar *tmp_pass;
-                       tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
-                       if (!tmp_pass)
-                               return NULL;
-                       Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return NULL;});
-                       g_free(tmp_pass);
-               }
-
-               if (imap_cmd_login(imap_sock, account->userid, pass) != IMAP_SUCCESS) {
-                       imap_cmd_logout(imap_sock);
-                       sock_close(imap_sock);
-                       return NULL;
-               }
-       }
 
        session = g_new(IMAPSession, 1);
        SESSION(session)->type             = SESSION_IMAP;
@@ -443,129 +558,65 @@ Session *imap_session_new(const PrefsAccount *account)
        SESSION(session)->phase            = SESSION_READY;
        SESSION(session)->last_access_time = time(NULL);
        SESSION(session)->data             = NULL;
+
+       SESSION(session)->destroy          = imap_session_destroy;
+
+       session->capability = NULL;
+
        session->mbox = NULL;
+       session->authenticated = is_preauth;
 
        session_list = g_list_append(session_list, session);
 
        return SESSION(session);
 }
 
-void imap_session_destroy(IMAPSession *session)
+void imap_session_authenticate(IMAPSession *session, const PrefsAccount *account)
 {
-       sock_close(SESSION(session)->sock);
-       SESSION(session)->sock = NULL;
-
-       g_free(session->mbox);
+       gchar *pass;
 
-       session_list = g_list_remove(session_list, session);
-}
+       g_return_if_fail(account->userid != NULL);
 
-void imap_session_destroy_all(void)
-{
-       while (session_list != NULL) {
-               IMAPSession *session = (IMAPSession *)session_list->data;
+       pass = account->passwd;
+       if (!pass) {
+               gchar *tmp_pass;
+               tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
+               if (!tmp_pass)
+                       return;
+               Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
+               g_free(tmp_pass);
+       }
 
+       if (imap_cmd_login(SESSION(session)->sock, account->userid, pass) != IMAP_SUCCESS) {
                imap_cmd_logout(SESSION(session)->sock);
-               session_destroy(SESSION(session));
+               return;
        }
-}
 
-#define THROW goto catch
+       session->authenticated = TRUE;
+}
 
-GSList *imap_get_msg_list(Folder *folder, FolderItem *item, gboolean use_cache)
+void imap_session_destroy(Session *session)
 {
-       GSList *mlist = NULL;
-       IMAPSession *session;
-       gint ok, exists = 0, recent = 0, unseen = 0;
-       guint32 uid_validity = 0;
-       guint32 first_uid = 0, last_uid = 0, begin;
-
-       g_return_val_if_fail(folder != NULL, NULL);
-       g_return_val_if_fail(item != NULL, NULL);
-       g_return_val_if_fail(folder->type == F_IMAP, NULL);
-       g_return_val_if_fail(folder->account != NULL, NULL);
-
-       session = imap_session_get(folder);
-
-       if (!session) {
-               mlist = procmsg_read_cache(item, FALSE);
-               item->last_num = procmsg_get_last_num_in_cache(mlist);
-               procmsg_set_flags(mlist, item);
-               statusbar_pop_all();
-               return mlist;
-       }
-
-       ok = imap_select(session, IMAP_FOLDER(folder), item->path,
-                        &exists, &recent, &unseen, &uid_validity);
-       if (ok != IMAP_SUCCESS) THROW;
-       if (exists > 0) {
-               ok = imap_get_uid(session, 1, &first_uid);
-               if (ok != IMAP_SUCCESS) THROW;
-               if (1 != exists) {
-                       ok = imap_get_uid(session, exists, &last_uid);
-                       if (ok != IMAP_SUCCESS) THROW;
-               } else
-                       last_uid = first_uid;
-       } else {
-               imap_delete_all_cached_messages(item);
-               statusbar_pop_all();
-               return NULL;
-       }
-
-       if (use_cache) {
-               guint32 cache_last;
+       sock_close(session->sock);
+       session->sock = NULL;
 
-               mlist = procmsg_read_cache(item, FALSE);
-               procmsg_set_flags(mlist, item);
-               cache_last = procmsg_get_last_num_in_cache(mlist);
+       g_free(IMAP_SESSION(session)->mbox);
 
-               /* calculating the range of envelope to get */
-               if (item->mtime != uid_validity) {
-                       /* mailbox is changed (get all) */
-                       begin = first_uid;
-               } else if (last_uid < cache_last) {
-                       /* mailbox is changed (get all) */
-                       begin = first_uid;
-               } else if (last_uid == cache_last) {
-                       /* mailbox unchanged (get none)*/
-                       begin = 0;
-               } else {
-                       begin = cache_last + 1;
-               }
+       g_strfreev(IMAP_SESSION(session)->capability);
 
-               item->mtime = uid_validity;
+       session_list = g_list_remove(session_list, session);
+}
 
-               if (first_uid > 0 && last_uid > 0) {
-                       mlist = imap_delete_cached_messages(mlist, item,
-                                                           0, first_uid - 1);
-                       mlist = imap_delete_cached_messages(mlist, item,
-                                                           last_uid + 1,
-                                                           UINT_MAX);
-               }
-               if (begin > 0)
-                       mlist = imap_delete_cached_messages(mlist, item,
-                                                           begin, UINT_MAX);
-       } else {
-               imap_delete_all_cached_messages(item);
-               begin = first_uid;
-       }
+void imap_session_destroy_all(void)
+{
+       while (session_list != NULL) {
+               IMAPSession *session = (IMAPSession *)session_list->data;
 
-       if (begin > 0 && begin <= last_uid) {
-               GSList *newlist;
-               newlist = imap_get_uncached_messages(session, item,
-                                                    begin, last_uid);
-               mlist = g_slist_concat(mlist, newlist);
+               imap_cmd_logout(SESSION(session)->sock);
+               session_destroy(SESSION(session));
        }
-
-       item->last_num = last_uid;
-
-catch:
-       statusbar_pop_all();
-       return mlist;
 }
 
-#undef THROW
-
 gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
 {
        gchar *path, *filename;
@@ -582,7 +633,7 @@ gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
        g_free(path);
  
        if (is_file_exist(filename)) {
-               debug_print(_("message %d has been already cached.\n"), uid);
+               debug_print("message %d has been already cached.\n", uid);
                return filename;
        }
 
@@ -594,20 +645,17 @@ gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
 
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
                         NULL, NULL, NULL, NULL);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
-               g_warning(_("can't select mailbox %s\n"), item->path);
+               g_warning("can't select mailbox %s\n", item->path);
                g_free(filename);
                return NULL;
        }
 
-       debug_print(_("getting message %d...\n"), uid);
+       debug_print("getting message %d...\n", uid);
        ok = imap_cmd_fetch(SESSION(session)->sock, (guint32)uid, filename);
 
-       statusbar_pop_all();
-
        if (ok != IMAP_SUCCESS) {
-               g_warning(_("can't fetch message %d\n"), uid);
+               g_warning("can't fetch message %d\n", uid);
                g_free(filename);
                return NULL;
        }
@@ -620,8 +668,6 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
 {
        gchar *destdir;
        IMAPSession *session;
-       gint messages, recent, unseen;
-       guint32 uid_next, uid_validity;
        gint ok;
 
        g_return_val_if_fail(folder != NULL, -1);
@@ -631,20 +677,12 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
        session = imap_session_get(folder);
        if (!session) return -1;
 
-       ok = imap_status(session, IMAP_FOLDER(folder), dest->path,
-                        &messages, &recent, &uid_next, &uid_validity, &unseen);
-       statusbar_pop_all();
-       if (ok != IMAP_SUCCESS) {
-               g_warning(_("can't append message %s\n"), file);
-               return -1;
-       }
-
        destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
        ok = imap_cmd_append(SESSION(session)->sock, destdir, file);
        g_free(destdir);
 
        if (ok != IMAP_SUCCESS) {
-               g_warning(_("can't append message %s\n"), file);
+               g_warning("can't append message %s\n", file);
                return -1;
        }
 
@@ -653,7 +691,7 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
                        FILE_OP_ERROR(file, "unlink");
        }
 
-       return uid_next;
+       return 0;
 }
 
 static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
@@ -661,10 +699,13 @@ static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
 {
        gchar *destdir;
        IMAPSession *session;
+       IMAPFlags iflags = 0;
+       gint messages, recent, unseen;
+       guint32 newuid = 0, uid_validity;
        gint ok;
-
+    
        g_return_val_if_fail(folder != NULL, -1);
-       g_return_val_if_fail(folder->type == F_IMAP, -1);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
        g_return_val_if_fail(dest != NULL, -1);
        g_return_val_if_fail(msginfo != NULL, -1);
 
@@ -672,22 +713,39 @@ static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
        if (!session) return -1;
 
        if (msginfo->folder == dest) {
-               g_warning(_("the src folder is identical to the dest.\n"));
+               g_warning("the src folder is identical to the dest.\n");
                return -1;
        }
 
+       /* if we don't have UIDPLUS we get UID-NEXT and hope that the
+          message really gets this uid */
+       if (!imap_has_capability(session, "UIDPLUS")) {
+               ok = imap_status(session, IMAP_FOLDER(folder), dest->path,
+                                &messages, &recent, &newuid, &uid_validity, &unseen);
+               if (ok != IMAP_SUCCESS) {
+                       g_warning("can't copy message\n");
+                       return -1;
+               }
+       }
+
        destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 
+       /* ensure source folder selected */
+       ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
+                        NULL, NULL, NULL, NULL);
+       if (ok != IMAP_SUCCESS)
+               return -1;
+        
        if (remove_source)
-               debug_print(_("Moving message %s%c%d to %s ...\n"),
+               debug_print("Moving message %s%c%d to %s ...\n",
                            msginfo->folder->path, G_DIR_SEPARATOR,
                            msginfo->msgnum, destdir);
        else
-               debug_print(_("Copying message %s%c%d to %s ...\n"),
+               debug_print("Copying message %s%c%d to %s ...\n",
                            msginfo->folder->path, G_DIR_SEPARATOR,
                            msginfo->msgnum, destdir);
 
-       ok = imap_cmd_copy(SESSION(session)->sock, msginfo->msgnum, destdir);
+       ok = imap_cmd_copy(session, msginfo->msgnum, destdir, &newuid);
 
        if (ok == IMAP_SUCCESS && remove_source) {
                imap_set_message_flags(session, msginfo->msgnum, msginfo->msgnum,
@@ -695,15 +753,30 @@ static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
                ok = imap_cmd_expunge(SESSION(session)->sock);
        }
 
+       /* get the dest folder to set the flags */
+       if (newuid) {
+               ok = imap_select(session, IMAP_FOLDER(folder), dest->path,
+                                NULL, NULL, NULL, NULL);
+               if (ok != IMAP_SUCCESS)         /* the folder disappeared? */
+                       return -1;
+
+               if (msginfo->flags.perm_flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
+               if (msginfo->flags.perm_flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
+               if (iflags)
+                       if (imap_set_message_flags(session, newuid, newuid, iflags, TRUE)
+                           != IMAP_SUCCESS)
+                               newuid = 0;
+       }
+
        g_free(destdir);
-       statusbar_pop_all();
 
        if (ok == IMAP_SUCCESS)
-               return 0;
+               return newuid;
        else
                return -1;
 }
 
+#if 0
 static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest, 
                                        GSList *msglist,
                                        gboolean remove_source)
@@ -727,21 +800,24 @@ static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
                msginfo = (MsgInfo *)cur->data;
 
                if (msginfo->folder == dest) {
-                       g_warning(_("the src folder is identical to the dest.\n"));
+                       g_warning("the src folder is identical to the dest.\n");
                        continue;
                }
 
+               /* ensure source folder selected */
+               ok = imap_select(session, IMAP_FOLDER(folder), 
+                                msginfo->folder->path, NULL, NULL, NULL, NULL);
+        
                if (remove_source)
-                       debug_print(_("Moving message %s%c%d to %s ...\n"),
+                       debug_print("Moving message %s%c%d to %s ...\n",
                                    msginfo->folder->path, G_DIR_SEPARATOR,
                                    msginfo->msgnum, destdir);
                else
-                       debug_print(_("Copying message %s%c%d to %s ...\n"),
+                       debug_print("Copying message %s%c%d to %s ...\n",
                                    msginfo->folder->path, G_DIR_SEPARATOR,
                                    msginfo->msgnum, destdir);
 
-               ok = imap_cmd_copy(SESSION(session)->sock, msginfo->msgnum,
-                                  destdir);
+               ok = imap_cmd_copy(session, msginfo, destdir);
 
                if (ok == IMAP_SUCCESS && remove_source) {
                        imap_set_message_flags
@@ -754,13 +830,13 @@ static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
                ok = imap_cmd_expunge(SESSION(session)->sock);
 
        g_free(destdir);
-       statusbar_pop_all();
 
        if (ok == IMAP_SUCCESS)
                return 0;
        else
                return -1;
 }
+#endif
 
 gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 {
@@ -781,12 +857,16 @@ gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
        ret = imap_add_msg(folder, dest, srcfile, FALSE);
        g_free(srcfile);
 
-       if (ret == 0)
-               ret = folder_item_remove_msg(msginfo->folder, msginfo->msgnum);
-
+       if (ret != -1) {
+               if(folder_item_remove_msg(msginfo->folder, msginfo->msgnum)) {
+                       ret = -1;
+               }
+       }
+               
        return ret;
 }
 
+#if 0
 gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest, 
                              GSList *msglist)
 {
@@ -805,11 +885,12 @@ gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest,
        for (cur = msglist; cur != NULL; cur = cur->next) {
                msginfo = (MsgInfo *)cur->data;
                ret = imap_move_msg(folder, dest, msginfo);
-               if (ret != 0) break;
+               if (ret == -1) break;
        }
 
        return ret;
 }
+#endif
 
 gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 {
@@ -834,6 +915,7 @@ gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
        return ret;
 }
 
+#if 0
 gint imap_copy_msgs_with_dest(Folder *folder, FolderItem *dest, 
                              GSList *msglist)
 {
@@ -853,57 +935,113 @@ gint imap_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
        for (cur = msglist; cur != NULL; cur = cur->next) {
                msginfo = (MsgInfo *)cur->data;
                ret = imap_copy_msg(folder, dest, msginfo);
-               if (ret != 0) break;
+               if (ret == -1) break;
        }
 
        return ret;
 }
+#endif
 
 gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
 {
-       gint exists, recent, unseen;
-       guint32 uid_validity;
        gint ok;
        IMAPSession *session;
+       gchar *dir;
 
        g_return_val_if_fail(folder != NULL, -1);
-       g_return_val_if_fail(folder->type == F_IMAP, -1);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
        g_return_val_if_fail(item != NULL, -1);
 
        session = imap_session_get(folder);
        if (!session) return -1;
 
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
-                        &exists, &recent, &unseen, &uid_validity);
-       statusbar_pop_all();
+                        NULL, NULL, NULL, NULL);
        if (ok != IMAP_SUCCESS)
                return ok;
 
        ok = imap_set_message_flags
                (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
                 (guint32)uid, (guint32)uid, IMAP_FLAG_DELETED, TRUE);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't set deleted flags: %d\n"), uid);
                return ok;
        }
 
        ok = imap_cmd_expunge(SESSION(session)->sock);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't expunge\n"));
                return ok;
        }
 
+       dir = folder_item_get_path(item);
+       if (is_dir_exist(dir))
+               remove_numbered_files(dir, uid, uid);
+       g_free(dir);
+
+       return IMAP_SUCCESS;
+}
+
+gint imap_remove_msgs(Folder *folder, FolderItem *item, GSList *msglist)
+{
+       gint ok;
+       IMAPSession *session;
+       gchar *dir;
+       MsgInfo *msginfo;
+       GSList *cur;
+       guint32 uid;
+
+       g_return_val_if_fail(folder != NULL, -1);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
+       g_return_val_if_fail(item != NULL, -1);
+       g_return_val_if_fail(msglist != NULL, -1);
+
+       session = imap_session_get(folder);
+       if (!session) return -1;
+
+       ok = imap_select(session, IMAP_FOLDER(folder), item->path,
+                        NULL, NULL, NULL, NULL);
+       if (ok != IMAP_SUCCESS)
+               return ok;
+
+       for (cur = msglist; cur != NULL; cur = cur->next) {
+               msginfo = (MsgInfo *)cur->data;
+               uid = msginfo->msgnum;
+               ok = imap_set_message_flags
+                       (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
+                        uid, uid, IMAP_FLAG_DELETED, TRUE);
+               if (ok != IMAP_SUCCESS) {
+                       log_warning(_("can't set deleted flags: %d\n"), uid);
+                       return ok;
+               }
+       }
+
+       ok = imap_cmd_expunge(SESSION(session)->sock);
+       if (ok != IMAP_SUCCESS) {
+               log_warning(_("can't expunge\n"));
+               return ok;
+       }
+
+       dir = folder_item_get_path(item);
+       if (is_dir_exist(dir)) {
+               for (cur = msglist; cur != NULL; cur = cur->next) {
+                       msginfo = (MsgInfo *)cur->data;
+                       uid = msginfo->msgnum;
+                       remove_numbered_files(dir, uid, uid);
+               }
+       }
+       g_free(dir);
        return IMAP_SUCCESS;
 }
 
 gint imap_remove_all_msg(Folder *folder, FolderItem *item)
 {
-       gint exists, recent, unseen;
-       guint32 uid_validity;
+        gint exists, recent, unseen;
+        guint32 uid_validity;
        gint ok;
        IMAPSession *session;
+       gchar *dir;
 
        g_return_val_if_fail(folder != NULL, -1);
        g_return_val_if_fail(item != NULL, -1);
@@ -913,7 +1051,6 @@ gint imap_remove_all_msg(Folder *folder, FolderItem *item)
 
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
                         &exists, &recent, &unseen, &uid_validity);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS)
                return ok;
        if (exists == 0)
@@ -922,19 +1059,22 @@ gint imap_remove_all_msg(Folder *folder, FolderItem *item)
        imap_cmd_gen_send(SESSION(session)->sock,
                          "STORE 1:%d +FLAGS (\\Deleted)", exists);
        ok = imap_cmd_ok(SESSION(session)->sock, NULL);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't set deleted flags: 1:%d\n"), exists);
                return ok;
        }
 
        ok = imap_cmd_expunge(SESSION(session)->sock);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't expunge\n"));
                return ok;
        }
 
+       dir = folder_item_get_path(item);
+       if (is_dir_exist(dir))
+               remove_all_numbered_files(dir);
+       g_free(dir);
+
        return IMAP_SUCCESS;
 }
 
@@ -959,7 +1099,6 @@ gint imap_scan_folder(Folder *folder, FolderItem *item)
 
        ok = imap_status(session, IMAP_FOLDER(folder), item->path,
                         &messages, &recent, &uid_next, &uid_validity, &unseen);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) return -1;
 
        item->new = unseen > 0 ? recent : 0;
@@ -973,7 +1112,6 @@ gint imap_scan_folder(Folder *folder, FolderItem *item)
 
 void imap_scan_tree(Folder *folder)
 {
-       IMAPFolder *imapfolder = IMAP_FOLDER(folder);
        FolderItem *item;
        IMAPSession *session;
        gchar *root_folder = NULL;
@@ -982,32 +1120,26 @@ void imap_scan_tree(Folder *folder)
        g_return_if_fail(folder->account != NULL);
 
        session = imap_session_get(folder);
-       if (!session) return;
-
-       if (folder->account->imap_dir && *folder->account->imap_dir) {
-               gchar *imap_dir;
-               IMAPNameSpace *namespace = NULL;
-
-               Xstrdup_a(imap_dir, folder->account->imap_dir, return);
-               strtailchomp(imap_dir, '/');
-
-               if (imapfolder->ns_personal && imapfolder->ns_personal->data)
-                       namespace = (IMAPNameSpace *)imapfolder->ns_personal->data;
-               root_folder = g_strconcat
-                       (namespace && namespace->name ? namespace->name : "",
-                        imap_dir, NULL);
-               if (namespace && namespace->separator)
-                       subst_char(root_folder, namespace->separator, '/');
+       if (!session) {
+               if (!folder->node) {
+                       folder_tree_destroy(folder);
+                       item = folder_item_new(folder, folder->name, NULL);
+                       item->folder = folder;
+                       folder->node = g_node_new(item);
+               }
+               return;
        }
 
-       if (root_folder)
+       if (folder->account->imap_dir && *folder->account->imap_dir) {
+               Xstrdup_a(root_folder, folder->account->imap_dir, return);
+               strtailchomp(root_folder, '/');
                debug_print("IMAP root directory: %s\n", root_folder);
+       }
 
-       folder_tree_destroy(folder);
-       item = folder_item_new(folder->name, root_folder);
+       item = folder_item_new(folder, folder->name, root_folder);
        item->folder = folder;
+       item->no_select = TRUE;
        folder->node = g_node_new(item);
-       g_free(root_folder);
 
        imap_scan_tree_recursive(session, item);
 
@@ -1056,7 +1188,7 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
                          wildcard_path);
 
        strtailchomp(real_path, separator);
-       item_list = imap_parse_list(session, real_path);
+       item_list = imap_parse_list(folder, session, real_path, NULL);
        g_free(real_path);
 
        for (cur = item_list; cur != NULL; cur = cur->next) {
@@ -1098,11 +1230,12 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
        return IMAP_SUCCESS;
 }
 
-static GSList *imap_parse_list(IMAPSession *session, const gchar *real_path)
+static GSList *imap_parse_list(Folder *folder, IMAPSession *session,
+                              const gchar *real_path, gchar *separator)
 {
        gchar buf[IMAPBUFSIZE];
        gchar flags[256];
-       gchar separator[16];
+       gchar separator_str[16];
        gchar *p;
        gchar *name;
        gchar *loc_name, *loc_path;
@@ -1138,11 +1271,13 @@ static GSList *imap_parse_list(IMAPSession *session, const gchar *real_path)
                if (!p) continue;
                while (*p == ' ') p++;
 
-               p = strchr_cpy(p, ' ', separator, sizeof(separator));
+               p = strchr_cpy(p, ' ', separator_str, sizeof(separator_str));
                if (!p) continue;
-               extract_quote(separator, '"');
-               if (!strcmp(separator, "NIL"))
-                       separator[0] = '\0';
+               extract_quote(separator_str, '"');
+               if (!strcmp(separator_str, "NIL"))
+                       separator_str[0] = '\0';
+               if (separator)
+                       *separator = separator_str[0];
 
                buf[0] = '\0';
                while (*p == ' ') p++;
@@ -1151,18 +1286,18 @@ static GSList *imap_parse_list(IMAPSession *session, const gchar *real_path)
                                            buf, sizeof(buf), str);
                else
                        strncpy2(buf, p, sizeof(buf));
-               strtailchomp(buf, separator[0]);
+               strtailchomp(buf, separator_str[0]);
                if (buf[0] == '\0') continue;
                if (!strcmp(buf, real_path)) continue;
 
-               if (separator[0] != '\0')
-                       subst_char(buf, separator[0], '/');
+               if (separator_str[0] != '\0')
+                       subst_char(buf, separator_str[0], '/');
                name = g_basename(buf);
                if (name[0] == '.') continue;
 
                loc_name = imap_modified_utf7_to_locale(name);
                loc_path = imap_modified_utf7_to_locale(buf);
-               new_item = folder_item_new(loc_name, loc_path);
+               new_item = folder_item_new(folder, loc_name, loc_path);
                if (strcasestr(flags, "\\Noinferiors") != NULL)
                        new_item->no_sub = TRUE;
                if (strcmp(buf, "INBOX") != 0 &&
@@ -1177,7 +1312,6 @@ static GSList *imap_parse_list(IMAPSession *session, const gchar *real_path)
        }
 
        g_string_free(str, TRUE);
-       statusbar_pop_all();
 
        return item_list;
 }
@@ -1235,12 +1369,12 @@ static FolderItem *imap_create_special_folder(Folder *folder,
        new_item = imap_create_folder(folder, item, name);
 
        if (!new_item) {
-               g_warning(_("Can't create '%s'\n"), name);
+               g_warning("Can't create '%s'\n", name);
                if (!folder->inbox) return NULL;
 
                new_item = imap_create_folder(folder, folder->inbox, name);
                if (!new_item)
-                       g_warning(_("Can't create '%s' under INBOX\n"), name);
+                       g_warning("Can't create '%s' under INBOX\n", name);
                else
                        new_item->stype = stype;
        } else
@@ -1283,8 +1417,10 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
        } else
                dirpath = g_strdup(name);
 
-       strtailchomp(dirpath, '/');
+       /* keep trailing directory separator to create a folder that contains
+          sub folder */
        imap_path = imap_locale_to_modified_utf7(dirpath);
+       strtailchomp(dirpath, '/');
        Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
        strtailchomp(new_name, '/');
        separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
@@ -1299,11 +1435,11 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                argbuf = g_ptr_array_new();
                ok = imap_cmd_list(SESSION(session)->sock, NULL, imap_path,
                                   argbuf);
-               statusbar_pop_all();
                if (ok != IMAP_SUCCESS) {
                        log_warning(_("can't create mailbox: LIST failed\n"));
                        g_free(imap_path);
                        g_free(dirpath);
+                       ptr_array_free_strings(argbuf);
                        g_ptr_array_free(argbuf, TRUE);
                        return NULL;
                }
@@ -1316,11 +1452,11 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                                break;
                        }
                }
+               ptr_array_free_strings(argbuf);
                g_ptr_array_free(argbuf, TRUE);
 
                if (!exist) {
                        ok = imap_cmd_create(SESSION(session)->sock, imap_path);
-                       statusbar_pop_all();
                        if (ok != IMAP_SUCCESS) {
                                log_warning(_("can't create mailbox\n"));
                                g_free(imap_path);
@@ -1330,7 +1466,7 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                }
        }
 
-       new_item = folder_item_new(new_name, dirpath);
+       new_item = folder_item_new(folder, new_name, dirpath);
        folder_item_append(parent, new_item);
        g_free(imap_path);
        g_free(dirpath);
@@ -1373,7 +1509,6 @@ gint imap_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
        session->mbox = NULL;
        ok = imap_cmd_examine(SESSION(session)->sock, "INBOX",
                              &exists, &recent, &unseen, &uid_validity);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                g_free(real_oldpath);
                return -1;
@@ -1391,7 +1526,6 @@ gint imap_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
        imap_path_separator_subst(real_newpath, separator);
 
        ok = imap_cmd_rename(SESSION(session)->sock, real_oldpath, real_newpath);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't rename mailbox: %s to %s\n"),
                            real_oldpath, real_newpath);
@@ -1450,14 +1584,12 @@ gint imap_remove_folder(Folder *folder, FolderItem *item)
 
        ok = imap_cmd_examine(SESSION(session)->sock, "INBOX",
                              &exists, &recent, &unseen, &uid_validity);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                g_free(path);
                return -1;
        }
 
        ok = imap_cmd_delete(SESSION(session)->sock, path);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't delete mailbox\n"));
                g_free(path);
@@ -1487,7 +1619,7 @@ static GSList *imap_get_uncached_messages(IMAPSession *session,
        g_return_val_if_fail(session != NULL, NULL);
        g_return_val_if_fail(item != NULL, NULL);
        g_return_val_if_fail(item->folder != NULL, NULL);
-       g_return_val_if_fail(item->folder->type == F_IMAP, NULL);
+       g_return_val_if_fail(FOLDER_CLASS(item->folder) == &imap_class, NULL);
        g_return_val_if_fail(first_uid <= last_uid, NULL);
 
        if (imap_cmd_envelope(SESSION(session)->sock, first_uid, last_uid)
@@ -1515,12 +1647,12 @@ static GSList *imap_get_uncached_messages(IMAPSession *session,
                        g_free(tmp);
                        continue;
                }
-               /* log_print("IMAP4< %s\n", tmp); */
-               debug_print("IMAP4< %s\n", tmp);
+               log_print("IMAP4< %s\n", tmp);
                g_string_assign(str, tmp);
                g_free(tmp);
 
-               msginfo = imap_parse_envelope(SESSION(session)->sock, str);
+               msginfo = imap_parse_envelope
+                       (SESSION(session)->sock, item, str);
                if (!msginfo) {
                        log_warning(_("can't parse envelope: %s\n"), str->str);
                        continue;
@@ -1546,62 +1678,32 @@ static GSList *imap_get_uncached_messages(IMAPSession *session,
        return newlist;
 }
 
-static GSList *imap_delete_cached_messages(GSList *mlist, FolderItem *item,
-                                          guint32 first_uid, guint32 last_uid)
-{
-       GSList *cur, *next;
-       MsgInfo *msginfo;
-       gchar *dir;
-
-       g_return_val_if_fail(item != NULL, mlist);
-       g_return_val_if_fail(item->folder != NULL, mlist);
-       g_return_val_if_fail(item->folder->type == F_IMAP, mlist);
-
-       debug_print(_("Deleting cached messages %d - %d ... "),
-                   first_uid, last_uid);
-
-       dir = folder_item_get_path(item);
-       remove_numbered_files(dir, first_uid, last_uid);
-       g_free(dir);
-
-       for (cur = mlist; cur != NULL; ) {
-               next = cur->next;
-
-               msginfo = (MsgInfo *)cur->data;
-               if (msginfo != NULL && first_uid <= msginfo->msgnum &&
-                   msginfo->msgnum <= last_uid) {
-                       procmsg_msginfo_free(msginfo);
-                       mlist = g_slist_remove(mlist, msginfo);
-               }
-
-               cur = next;
-       }
-
-       debug_print(_("done.\n"));
-
-       return mlist;
-}
-
 static void imap_delete_all_cached_messages(FolderItem *item)
 {
        gchar *dir;
 
        g_return_if_fail(item != NULL);
        g_return_if_fail(item->folder != NULL);
-       g_return_if_fail(item->folder->type == F_IMAP);
+       g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
 
-       debug_print(_("Deleting all cached messages... "));
+       debug_print("Deleting all cached messages...\n");
 
        dir = folder_item_get_path(item);
-       remove_all_numbered_files(dir);
+       if (is_dir_exist(dir))
+               remove_all_numbered_files(dir);
        g_free(dir);
 
-       debug_print(_("done.\n"));
+       debug_print("done.\n");
 }
 
-
+#if USE_OPENSSL
+static SockInfo *imap_open_tunnel(const gchar *server,
+                          const gchar *tunnelcmd,
+                          SSLType ssl_type)
+#else
 static SockInfo *imap_open_tunnel(const gchar *server,
                           const gchar *tunnelcmd)
+#endif
 {
        SockInfo *sock;
 
@@ -1609,14 +1711,17 @@ static SockInfo *imap_open_tunnel(const gchar *server,
                log_warning(_("Can't establish IMAP4 session with: %s\n"),
                            server);
                return NULL;
-
+#if USE_OPENSSL
+       return imap_init_sock(sock, ssl_type);
+#else
        return imap_init_sock(sock);
+#endif
 }
 
 
-#if USE_SSL
+#if USE_OPENSSL
 static SockInfo *imap_open(const gchar *server, gushort port,
-                          gboolean use_ssl)
+                          SSLType ssl_type)
 #else
 static SockInfo *imap_open(const gchar *server, gushort port)
 #endif
@@ -1629,25 +1734,45 @@ static SockInfo *imap_open(const gchar *server, gushort port)
                return NULL;
        }
 
-#if USE_SSL
-       if (use_ssl && !ssl_init_socket(sock)) {
+#if USE_OPENSSL
+       if (ssl_type == SSL_TUNNEL && !ssl_init_socket(sock)) {
                log_warning(_("Can't establish IMAP4 session with: %s:%d\n"),
                            server, port);
                sock_close(sock);
                return NULL;
        }
-#endif
-
+       return imap_init_sock(sock, ssl_type);
+#else
        return imap_init_sock(sock);
+#endif
 }
 
-
+#if USE_OPENSSL
+static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type)
+#else
 static SockInfo *imap_init_sock(SockInfo *sock)
+#endif
 {
        imap_cmd_count = 0;
+#if USE_OPENSSL
+       if (ssl_type == SSL_STARTTLS) {
+               gint ok;
+
+               ok = imap_cmd_starttls(sock);
+               if (ok != IMAP_SUCCESS) {
+                       log_warning(_("Can't start TLS session.\n"));
+                       sock_close(sock);
+                       return NULL;
+               }
+               if (!ssl_init_socket_with_method(sock, SSL_METHOD_TLSv1)) {
+                       sock_close(sock);
+                       return NULL;
+               }
+       }
+#endif
 
        if (imap_cmd_noop(sock) != IMAP_SUCCESS) {
-               log_warning(_("Can't establish IMAP4 session\n"));
+               log_warning(_("Can't establish IMAP4 session.\n"));
                sock_close(sock);
                return NULL;
        }
@@ -1719,6 +1844,11 @@ static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
            folder->ns_shared   != NULL)
                return;
 
+       if (!imap_has_capability(session, "NAMESPACE")) {
+               imap_get_namespace_by_list(session, folder);
+               return;
+       }
+       
        if (imap_cmd_namespace(SESSION(session)->sock, &ns_str)
            != IMAP_SUCCESS) {
                log_warning(_("can't get namespace\n"));
@@ -1726,6 +1856,11 @@ static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
        }
 
        str_array = strsplit_parenthesis(ns_str, '(', ')', 3);
+       if (str_array == NULL) {
+               g_free(ns_str);
+               imap_get_namespace_by_list(session, folder);
+               return;
+       }
        if (str_array[0])
                folder->ns_personal = imap_parse_namespace_str(str_array[0]);
        if (str_array[0] && str_array[1])
@@ -1733,7 +1868,33 @@ static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
        if (str_array[0] && str_array[1] && str_array[2])
                folder->ns_shared = imap_parse_namespace_str(str_array[2]);
        g_strfreev(str_array);
-       return;
+       g_free(ns_str);
+}
+
+static void imap_get_namespace_by_list(IMAPSession *session, IMAPFolder *folder)
+{
+       GSList *item_list, *cur;
+       gchar separator = '\0';
+       IMAPNameSpace *namespace;
+
+       g_return_if_fail(session != NULL);
+       g_return_if_fail(folder != NULL);
+
+       if (folder->ns_personal != NULL ||
+           folder->ns_others   != NULL ||
+           folder->ns_shared   != NULL)
+               return;
+
+       imap_cmd_gen_send(SESSION(session)->sock, "LIST \"\" \"\"");
+       item_list = imap_parse_list(NULL, session, "", &separator);
+       for (cur = item_list; cur != NULL; cur = cur->next)
+               folder_item_destroy(FOLDER_ITEM(cur->data));
+       g_slist_free(item_list);
+
+       namespace = g_new(IMAPNameSpace, 1);
+       namespace->name = g_strdup("");
+       namespace->separator = separator;
+       folder->ns_personal = g_list_append(NULL, namespace);
 }
 
 static IMAPNameSpace *imap_find_namespace_from_list(GList *ns_list,
@@ -1865,98 +2026,66 @@ static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
        return cur_pos;
 }
 
-static gchar *imap_parse_one_address(SockInfo *sock, gchar *start,
-                                    gchar *out_from_str,
-                                    gchar *out_fromname_str,
-                                    GString *str)
+static gchar *imap_get_header(SockInfo *sock, gchar *cur_pos, gchar **headers,
+                             GString *str)
 {
-       gchar buf[IMAPBUFSIZE];
-       gchar *userid;
-       gchar *domain;
-       gchar *cur_pos = start;
-
-       cur_pos = imap_parse_atom(sock, cur_pos, buf, sizeof(buf), str);
-       conv_unmime_header(out_fromname_str, IMAPBUFSIZE, buf, NULL);
-
-       cur_pos = imap_parse_atom(sock, cur_pos, buf, sizeof(buf), str);
+       gchar *nextline;
+       gchar buf[32];
+       gint len;
+       gint block_len = 0;
 
-       cur_pos = imap_parse_atom(sock, cur_pos, buf, sizeof(buf), str);
-       Xstrdup_a(userid, buf, return cur_pos + 1);
+       *headers = NULL;
 
-       cur_pos = imap_parse_atom(sock, cur_pos, buf, sizeof(buf), str);
-       Xstrdup_a(domain, buf, return cur_pos + 1);
+       g_return_val_if_fail(str != NULL, cur_pos);
 
-       if (out_fromname_str[0] != '\0') {
-               g_snprintf(out_from_str, IMAPBUFSIZE, "\"%s\" <%s@%s>",
-                          out_fromname_str, userid, domain);
-       } else {
-               g_snprintf(out_from_str, IMAPBUFSIZE, "%s@%s",
-                          userid, domain);
-               strcpy(out_fromname_str, out_from_str);
-       }
+       while (isspace(*cur_pos)) cur_pos++;
 
-       while (*cur_pos == ' ') cur_pos++;
-       g_return_val_if_fail(*cur_pos == ')', NULL);
+       g_return_val_if_fail(*cur_pos == '{', cur_pos);
 
-       return cur_pos + 1;
-}
+       cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
+       len = atoi(buf);
 
-static gchar *imap_parse_address(SockInfo *sock, gchar *start,
-                                gchar **out_from_str,
-                                gchar **out_fromname_str,
-                                GString *str)
-{
-       gchar buf[IMAPBUFSIZE];
-       gchar name_buf[IMAPBUFSIZE];
-       gchar *cur_pos = start;
-       GString *addr_str;
+       g_string_truncate(str, 0);
+       cur_pos = str->str;
 
-       if (out_from_str)     *out_from_str     = NULL;
-       if (out_fromname_str) *out_fromname_str = NULL;
-       buf[0] = name_buf[0] = '\0';
+       do {
+               if ((nextline = sock_getline(sock)) == NULL)
+                       return cur_pos;
+               block_len += strlen(nextline);
+               g_string_append(str, nextline);
+               cur_pos = str->str;
+               strretchomp(nextline);
+               /* debug_print("IMAP4< %s\n", nextline); */
+               g_free(nextline);
+       } while (block_len < len);
 
-       if (!strncmp(cur_pos, "NIL", 3)) {
-               if (out_from_str)     *out_from_str     = g_strdup("");
-               if (out_fromname_str) *out_fromname_str = g_strdup("");
-               return cur_pos + 3;
-       }
+       debug_print("IMAP4< [contents of BODY.PEEK[HEADER.FIELDS (...)]]\n");
 
-       g_return_val_if_fail(*cur_pos == '(', NULL);
-       cur_pos++;
+       *headers = g_strndup(cur_pos, len);
+       cur_pos += len;
 
-       addr_str = g_string_new(NULL);
+       while (isspace(*cur_pos)) cur_pos++;
+       while (*cur_pos == '\0') {
+               if ((nextline = sock_getline(sock)) == NULL)
+                       return cur_pos;
+               g_string_assign(str, nextline);
+               cur_pos = str->str;
+               strretchomp(nextline);
+               debug_print("IMAP4< %s\n", nextline);
+               g_free(nextline);
 
-       for (;;) {
-               gchar ch = *cur_pos++;
-               if (ch == ')') break;
-               if (ch == '(') {
-                       cur_pos = imap_parse_one_address
-                               (sock, cur_pos, buf, name_buf, str);
-                       if (!cur_pos) {
-                               g_string_free(addr_str, TRUE);
-                               return NULL;
-                       }
-                       if (addr_str->str[0] != '\0')
-                               g_string_append(addr_str, ", ");
-                       g_string_append(addr_str, buf);
-               }
+               while (isspace(*cur_pos)) cur_pos++;
        }
 
-       if (out_from_str)     *out_from_str     = g_strdup(addr_str->str);
-       if (out_fromname_str) *out_fromname_str = g_strdup(name_buf);
-
-       g_string_free(addr_str, TRUE);
-
        return cur_pos;
 }
 
 static MsgFlags imap_parse_flags(const gchar *flag_str)  
 {
        const gchar *p = flag_str;
-       MsgFlags flags;
+       MsgFlags flags = {0, 0};
 
        flags.perm_flags = MSG_UNREAD;
-       flags.tmp_flags  = MSG_IMAP;
 
        while ((p = strchr(p, '\\')) != NULL) {
                p++;
@@ -1977,38 +2106,38 @@ static MsgFlags imap_parse_flags(const gchar *flag_str)
        return flags;
 }
 
-static MsgInfo *imap_parse_envelope(SockInfo *sock, GString *line_str)
+static MsgInfo *imap_parse_envelope(SockInfo *sock, FolderItem *item,
+                                   GString *line_str)
 {
-       MsgInfo *msginfo;
        gchar buf[IMAPBUFSIZE];
-       gchar tmp[IMAPBUFSIZE];
+       MsgInfo *msginfo = NULL;
        gchar *cur_pos;
        gint msgnum;
        guint32 uid = 0;
        size_t size = 0;
-       gchar *date = NULL;
-       time_t date_t = 0;
-       gchar *subject = NULL;
-       gchar *tmp_from;
-       gchar *tmp_fromname;
-       gchar *from = NULL;
-       gchar *fromname = NULL;
-       gchar *tmp_to;
-       gchar *to = NULL;
-       gchar *inreplyto = NULL;
-       gchar *msgid = NULL;
-       MsgFlags flags = {0, 0};
+       MsgFlags flags = {0, 0}, imap_flags = {0, 0};
 
        g_return_val_if_fail(line_str != NULL, NULL);
        g_return_val_if_fail(line_str->str[0] == '*' &&
                             line_str->str[1] == ' ', NULL);
 
+       MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
+       if (item->stype == F_QUEUE) {
+               MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
+       } else if (item->stype == F_DRAFT) {
+               MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
+       }
+
        cur_pos = line_str->str + 2;
 
-#define PARSE_ONE_ELEMENT(ch) \
-{ \
-       cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf)); \
-       g_return_val_if_fail(cur_pos != NULL, NULL); \
+#define PARSE_ONE_ELEMENT(ch)                                  \
+{                                                              \
+       cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf));    \
+       if (cur_pos == NULL) {                                  \
+               g_warning("cur_pos == NULL\n");                 \
+               procmsg_msginfo_free(msginfo);                  \
+               return NULL;                                    \
+       }                                                       \
 }
 
        PARSE_ONE_ELEMENT(' ');
@@ -2028,114 +2157,51 @@ static MsgInfo *imap_parse_envelope(SockInfo *sock, GString *line_str)
                        uid = strtoul(cur_pos, &cur_pos, 10);
                } else if (!strncmp(cur_pos, "FLAGS ", 6)) {
                        cur_pos += 6;
-                       g_return_val_if_fail(*cur_pos == '(', NULL);
+                       if (*cur_pos != '(') {
+                               g_warning("*cur_pos != '('\n");
+                               procmsg_msginfo_free(msginfo);
+                               return NULL;
+                       }
                        cur_pos++;
                        PARSE_ONE_ELEMENT(')');
-                       flags = imap_parse_flags(buf);
+                       imap_flags = imap_parse_flags(buf);
                } else if (!strncmp(cur_pos, "RFC822.SIZE ", 12)) {
                        cur_pos += 12;
                        size = strtol(cur_pos, &cur_pos, 10);
-               } else if (!strncmp(cur_pos, "ENVELOPE ", 9)) {
-                       cur_pos += 9;
-                       g_return_val_if_fail(*cur_pos == '(', NULL);
-                       cur_pos = imap_parse_atom
-                               (sock, cur_pos + 1, buf, sizeof(buf), line_str);
-                       if (buf[0] != '\0') {
-                               Xstrdup_a(date, buf, return NULL);
-                               date_t = procheader_date_parse(NULL, date, 0);
-                       }
-
-                       cur_pos = imap_parse_atom
-                               (sock, cur_pos, buf, sizeof(buf), line_str);
-                       if (buf[0] != '\0') {
-                               conv_unmime_header(tmp, sizeof(tmp), buf, NULL);
-                               Xstrdup_a(subject, tmp, return NULL);
-                       }
+               } else if (!strncmp(cur_pos, "BODY[HEADER.FIELDS ", 19)) {
+                       gchar *headers;
 
-                       g_return_val_if_fail(*cur_pos == ' ', NULL);
-                       cur_pos = imap_parse_address(sock, cur_pos + 1,
-                                                    &tmp_from, &tmp_fromname,
-                                                    line_str);
-                       g_return_val_if_fail(cur_pos != NULL, NULL);
-                       if (tmp_from && *tmp_from != '\0')
-                               Xstrdup_a(from, tmp_from,
-                                         {g_free(tmp_from);
-                                          g_free(tmp_fromname);
-                                          return NULL;});
-                       if (tmp_fromname && *tmp_fromname != '\0')
-                               Xstrdup_a(fromname, tmp_fromname,
-                                         {g_free(tmp_from);
-                                          g_free(tmp_fromname);
-                                          return NULL;});
-                       g_free(tmp_from);
-                       g_free(tmp_fromname);
-
-#define SKIP_ONE_ELEMENT() \
-{ \
-       g_return_val_if_fail(*cur_pos == ' ', NULL); \
-       cur_pos = imap_parse_address(sock, cur_pos + 1, NULL, NULL, \
-                                    line_str); \
-       g_return_val_if_fail(cur_pos != NULL, NULL); \
-}
-
-                       /* skip sender and reply-to */
-                       SKIP_ONE_ELEMENT();
-                       SKIP_ONE_ELEMENT();
-
-                       g_return_val_if_fail(*cur_pos == ' ', NULL);
-                       cur_pos = imap_parse_address(sock, cur_pos + 1,
-                                                    &tmp_to, NULL, line_str);
-                       g_return_val_if_fail(cur_pos != NULL, NULL);
-                       Xstrdup_a(to, tmp_to, {g_free(tmp_to); return NULL;});
-                       g_free(tmp_to);
-
-                       /* skip Cc and Bcc */
-                       SKIP_ONE_ELEMENT();
-                       SKIP_ONE_ELEMENT();
-
-#undef SKIP_ONE_ELEMENT
-
-                       g_return_val_if_fail(*cur_pos == ' ', NULL);
-                       cur_pos = imap_parse_atom
-                               (sock, cur_pos, buf, sizeof(buf), line_str);
-                       g_return_val_if_fail(cur_pos != NULL, NULL);
-                       if (buf[0] != '\0') {
-                               eliminate_parenthesis(buf, '(', ')');
-                               extract_parenthesis(buf, '<', '>');
-                               remove_space(buf);
-                               Xstrdup_a(inreplyto, buf, return NULL);
+                       cur_pos += 19;
+                       if (*cur_pos != '(') {
+                               g_warning("*cur_pos != '('\n");
+                               procmsg_msginfo_free(msginfo);
+                               return NULL;
                        }
-
-                       g_return_val_if_fail(*cur_pos == ' ', NULL);
-                       cur_pos = imap_parse_atom
-                               (sock, cur_pos, buf, sizeof(buf), line_str);
-                       g_return_val_if_fail(cur_pos != NULL, NULL);
-                       if (buf[0] != '\0') {
-                               extract_parenthesis(buf, '<', '>');
-                               remove_space(buf);
-                               Xstrdup_a(msgid, buf, return NULL);
+                       cur_pos++;
+                       PARSE_ONE_ELEMENT(')');
+                       if (*cur_pos != ']') {
+                               g_warning("*cur_pos != ']'\n");
+                               procmsg_msginfo_free(msginfo);
+                               return NULL;
                        }
-
-                       g_return_val_if_fail(*cur_pos == ')', NULL);
                        cur_pos++;
+
+                       cur_pos = imap_get_header(sock, cur_pos, &headers,
+                                                 line_str);
+                       msginfo = procheader_parse_str(headers, flags, FALSE, FALSE);
+                       g_free(headers);
                } else {
                        g_warning("invalid FETCH response: %s\n", cur_pos);
                        break;
                }
        }
 
-       msginfo = g_new0(MsgInfo, 1);
-       msginfo->msgnum = uid;
-       msginfo->size = size;
-       msginfo->date = g_strdup(date);
-       msginfo->date_t = date_t;
-       msginfo->subject = g_strdup(subject);
-       msginfo->from = g_strdup(from);
-       msginfo->fromname = g_strdup(fromname);
-       msginfo->to = g_strdup(to);
-       msginfo->inreplyto = g_strdup(inreplyto);
-       msginfo->msgid = g_strdup(msgid);
-       msginfo->flags = flags;
+       if (msginfo) {
+               msginfo->msgnum = uid;
+               msginfo->size = size;
+               msginfo->flags.tmp_flags |= imap_flags.tmp_flags;
+               msginfo->flags.perm_flags = imap_flags.perm_flags;
+       }
 
        return msginfo;
 }
@@ -2148,16 +2214,19 @@ gint imap_msg_set_perm_flags(MsgInfo *msginfo, MsgPermFlags flags)
        gint ok = IMAP_SUCCESS;
 
        g_return_val_if_fail(msginfo != NULL, -1);
-       g_return_val_if_fail(MSG_IS_IMAP(msginfo->flags), -1);
        g_return_val_if_fail(msginfo->folder != NULL, -1);
        g_return_val_if_fail(msginfo->folder->folder != NULL, -1);
 
        folder = msginfo->folder->folder;
-       g_return_val_if_fail(folder->type == F_IMAP, -1);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
 
        session = imap_session_get(folder);
        if (!session) return -1;
 
+       if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
+           NULL, NULL, NULL, NULL)) != IMAP_SUCCESS)
+               return ok;
+
        if (flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
        if (flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
        if (iflags) {
@@ -2181,12 +2250,11 @@ gint imap_msg_unset_perm_flags(MsgInfo *msginfo, MsgPermFlags flags)
        gint ok = IMAP_SUCCESS;
 
        g_return_val_if_fail(msginfo != NULL, -1);
-       g_return_val_if_fail(MSG_IS_IMAP(msginfo->flags), -1);
        g_return_val_if_fail(msginfo->folder != NULL, -1);
        g_return_val_if_fail(msginfo->folder->folder != NULL, -1);
 
        folder = msginfo->folder->folder;
-       g_return_val_if_fail(folder->type == F_IMAP, -1);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
 
        session = imap_session_get(folder);
        if (!session) return -1;
@@ -2270,36 +2338,6 @@ static gint imap_select(IMAPSession *session, IMAPFolder *folder,
 
 #define THROW(err) { ok = err; goto catch; }
 
-static gint imap_get_uid(IMAPSession *session, gint msgnum, guint32 *uid)
-{
-       gint ok;
-       GPtrArray *argbuf;
-       gchar *str;
-       gint num;
-
-       *uid = 0;
-       argbuf = g_ptr_array_new();
-
-       imap_cmd_gen_send(SESSION(session)->sock, "FETCH %d (UID)", msgnum);
-       if ((ok = imap_cmd_ok(SESSION(session)->sock, argbuf)) != IMAP_SUCCESS)
-               THROW(ok);
-
-       str = search_array_contain_str(argbuf, "FETCH");
-       if (!str) THROW(IMAP_ERROR);
-
-       if (sscanf(str, "%d FETCH (UID %d)", &num, uid) != 2 ||
-           num != msgnum) {
-               g_warning("imap_get_uid(): invalid FETCH line.\n");
-               THROW(IMAP_ERROR);
-       }
-
-catch:
-       ptr_array_free_strings(argbuf);
-       g_ptr_array_free(argbuf, TRUE);
-
-       return ok;
-}
-
 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
                        const gchar *path,
                        gint *messages, gint *recent,
@@ -2401,17 +2439,64 @@ static gint imap_greeting(SockInfo *sock, gboolean *is_preauth)
        imap_cmd_gen_send(sock, "NOOP");
        argbuf = g_ptr_array_new(); /* will hold messages sent back */
        r = imap_cmd_ok(sock, argbuf);
-       *is_preauth = search_array_starts(argbuf, "PREAUTH") != NULL;
+       *is_preauth = search_array_str(argbuf, "PREAUTH") != NULL;
+
+       ptr_array_free_strings(argbuf);
+       g_ptr_array_free(argbuf, TRUE);
        
        return r;
 }
 
+static void imap_get_capability(Session *session)
+{
+       gchar *capstr;
+       GPtrArray *argbuf;
+
+       if (IMAP_SESSION(session)->capability != NULL)
+               return;
+
+       imap_cmd_gen_send(session->sock, "CAPABILITY");
+       
+       argbuf = g_ptr_array_new();
+
+       if (imap_cmd_ok(session->sock, argbuf) != IMAP_SUCCESS ||
+           ((capstr = search_array_str(argbuf, "CAPABILITY ")) == NULL)) {
+               ptr_array_free_strings(argbuf);
+               g_ptr_array_free(argbuf, TRUE);
+               return;
+       }
+       
+       capstr += strlen("CAPABILITY ");
+
+       IMAP_SESSION(session)->capability = g_strsplit(capstr, " ", 0);
+       
+       ptr_array_free_strings(argbuf);
+       g_ptr_array_free(argbuf, TRUE);
+}
+
+static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
+{
+       gchar **p;
+       
+       for (p = session->capability; *p != NULL; ++p)
+               if (g_strcasecmp(*p, cap) == 0)
+                       return TRUE;
+
+       return FALSE;
+}
+
 static gint imap_cmd_noop(SockInfo *sock)
 {
        imap_cmd_gen_send(sock, "NOOP");
        return imap_cmd_ok(sock, NULL);
 }
 
+static gint imap_cmd_starttls(SockInfo *sock)
+{
+       imap_cmd_gen_send(sock, "STARTTLS");
+       return imap_cmd_ok(sock, NULL);
+}
+
 #define THROW(err) { ok = err; goto catch; }
 
 static gint imap_cmd_namespace(SockInfo *sock, gchar **ns_str)
@@ -2570,10 +2655,49 @@ static gint imap_cmd_delete(SockInfo *sock, const gchar *folder)
        return imap_cmd_ok(sock, NULL);
 }
 
+static gint imap_cmd_search(SockInfo *sock, const gchar *criteria, GSList **list)
+{
+       gint ok;
+       gchar *uidlist;
+       GPtrArray *argbuf;
+
+       g_return_val_if_fail(criteria != NULL, IMAP_ERROR);
+       g_return_val_if_fail(list != NULL, IMAP_ERROR);
+
+       *list = NULL;
+       
+       argbuf = g_ptr_array_new();
+       imap_cmd_gen_send(sock, "UID SEARCH %s", criteria);
+
+       ok = imap_cmd_ok(sock, argbuf);
+       if (ok != IMAP_SUCCESS) {
+               ptr_array_free_strings(argbuf);
+               g_ptr_array_free(argbuf, TRUE);
+               return ok;
+       }
+
+       if ((uidlist = search_array_str(argbuf, "SEARCH ")) != NULL) {
+               gchar **strlist, **p;
+
+               strlist = g_strsplit(uidlist + 7, " ", 0);
+               for (p = strlist; *p != NULL; ++p) {
+                       guint msgnum;
+
+                       if (sscanf(*p, "%d", &msgnum) == 1)
+                               *list = g_slist_append(*list, GINT_TO_POINTER(msgnum));
+               }
+               g_strfreev(strlist);
+       }
+       ptr_array_free_strings(argbuf);
+       g_ptr_array_free(argbuf, TRUE);
+
+       return IMAP_SUCCESS;
+}
+
 static gint imap_cmd_fetch(SockInfo *sock, guint32 uid, const gchar *filename)
 {
        gint ok;
-       gchar buf[IMAPBUFSIZE];
+       gchar *buf;
        gchar *cur_pos;
        gchar size_str[32];
        glong size_num;
@@ -2582,10 +2706,12 @@ static gint imap_cmd_fetch(SockInfo *sock, guint32 uid, const gchar *filename)
 
        imap_cmd_gen_send(sock, "UID FETCH %d BODY[]", uid);
 
-       while ((ok = imap_cmd_gen_recv(sock, buf, sizeof(buf)))
+       while ((ok = imap_cmd_gen_recv(sock, &buf))
               == IMAP_SUCCESS) {
-               if (buf[0] != '*' || buf[1] != ' ')
+               if (buf[0] != '*' || buf[1] != ' ') {
+                       g_free(buf);
                        return IMAP_ERROR;
+               }
                if (strstr(buf, "FETCH") != NULL)
                        break;
        }
@@ -2593,22 +2719,38 @@ static gint imap_cmd_fetch(SockInfo *sock, guint32 uid, const gchar *filename)
                return ok;
 
        cur_pos = strchr(buf, '{');
-       g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
+       if (cur_pos == NULL) {
+               g_free(buf);
+               return IMAP_ERROR;
+       }
        cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
-       g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
+       if (cur_pos == NULL) {
+               g_free(buf);
+               return IMAP_ERROR;
+       }
        size_num = atol(size_str);
 
-       if (*cur_pos != '\0') return IMAP_ERROR;
+       if (*cur_pos != '\0') {
+               g_free(buf);
+               return IMAP_ERROR;
+       }
 
-       if (recv_bytes_write_to_file(sock, size_num, filename) != 0)
+       if (recv_bytes_write_to_file(sock, size_num, filename) != 0) {
+               g_free(buf);
                return IMAP_ERROR;
+       }
 
-       if (imap_cmd_gen_recv(sock, buf, sizeof(buf)) != IMAP_SUCCESS)
+       if (imap_cmd_gen_recv(sock, &buf) != IMAP_SUCCESS) {
+               g_free(buf);
                return IMAP_ERROR;
+       }
 
-       if (buf[0] == '\0' || buf[strlen(buf) - 1] != ')')
+       if (buf[0] == '\0' || buf[strlen(buf) - 1] != ')') {
+               g_free(buf);
                return IMAP_ERROR;
+       }
 
+       g_free(buf);
        ok = imap_cmd_ok(sock, NULL);
 
        return ok;
@@ -2620,7 +2762,7 @@ static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
        gint ok;
        gint size;
        gchar *destfolder_;
-       gchar buf[BUFFSIZE];
+       gchar buf[BUFFSIZE], *imapbuf;
        FILE *fp;
 
        g_return_val_if_fail(file != NULL, IMAP_ERROR);
@@ -2633,12 +2775,14 @@ static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
        QUOTE_IF_REQUIRED(destfolder_, destfolder);
        imap_cmd_gen_send(sock, "APPEND %s (\\Seen) {%d}", destfolder_, size);
 
-       ok = imap_cmd_gen_recv(sock, buf, sizeof(buf));
-       if (ok != IMAP_SUCCESS || buf[0] != '+' || buf[1] != ' ') {
+       ok = imap_cmd_gen_recv(sock, &imapbuf);
+       if (ok != IMAP_SUCCESS || imapbuf[0] != '+' || imapbuf[1] != ' ') {
                log_warning(_("can't append %s to %s\n"), file, destfolder_);
+               g_free(imapbuf);
                fclose(fp);
                return IMAP_ERROR;
        }
+       g_free(imapbuf);
 
        log_print("IMAP4> %s\n", _("(sending file...)"));
 
@@ -2664,30 +2808,105 @@ static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
        return imap_cmd_ok(sock, NULL);
 }
 
-static gint imap_cmd_copy(SockInfo *sock, guint32 uid, const gchar *destfolder)
+#if 0
+static void imap_uidplus_copy(IMAPSession *session, MsgInfo *msginfo,
+                               const gchar *destfolder, const gchar *okmsginfo)
+{
+       unsigned int olduid, newuid;
+       IMAPFlags iflags = 0;
+
+       if (okmsginfo == NULL)
+               return;
+
+       if (sscanf(okmsginfo, "%*u OK [COPYUID %*llu %u %u]", &olduid, &newuid) != 2)
+               return;
+
+       if (olduid != msginfo->msgnum)  /* this should NEVER happen */
+               return;
+
+       if (imap_select(session, IMAP_FOLDER(msginfo->folder->folder), destfolder,
+                       NULL, NULL, NULL, NULL) != IMAP_SUCCESS)
+               return;
+
+       if (msginfo->flags.perm_flags & MSG_MARKED)  iflags |= IMAP_FLAG_FLAGGED;
+       if (msginfo->flags.perm_flags & MSG_REPLIED) iflags |= IMAP_FLAG_ANSWERED;
+       if (iflags)
+               imap_set_message_flags(session, newuid, newuid, iflags, TRUE);
+
+       if (msginfo->flags.perm_flags & MSG_UNREAD)
+               imap_set_message_flags(session, newuid, newuid, IMAP_FLAG_SEEN, FALSE);
+
+       imap_select(session, IMAP_FOLDER(msginfo->folder->folder), msginfo->folder->path,
+                   NULL, NULL, NULL, NULL);
+}
+#endif
+
+static gint imap_cmd_copy(IMAPSession *session,
+    gint32 msgnum, const gchar *destfolder, gint32 *new_uid)
 {
        gint ok;
+       gint32 olduid, newuid;
+       gchar *okmsginfo;
        gchar *destfolder_;
+       GPtrArray *reply;
 
        g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
+       g_return_val_if_fail(session != NULL, IMAP_ERROR);
+       g_return_val_if_fail(new_uid != NULL, IMAP_ERROR);
 
        QUOTE_IF_REQUIRED(destfolder_, destfolder);
-       imap_cmd_gen_send(sock, "UID COPY %d %s", uid, destfolder_);
+       imap_cmd_gen_send(SESSION(session)->sock, "UID COPY %d %s", msgnum, destfolder_);
 
-       ok = imap_cmd_ok(sock, NULL);
-       if (ok != IMAP_SUCCESS) {
-               log_warning(_("can't copy %d to %s\n"), uid, destfolder_);
-               return -1;
-       }
+       reply = g_ptr_array_new();
 
+       ok = imap_cmd_ok(SESSION(session)->sock, reply);
+       if (ok != IMAP_SUCCESS)
+               log_warning(_("can't copy %d to %s\n"), msgnum, destfolder_);
+       else if (imap_has_capability(session, "UIDPLUS") && reply->len > 0)
+               if ((okmsginfo = g_ptr_array_index(reply, reply->len - 1)) != NULL &&
+                   sscanf(okmsginfo, "%*u OK [COPYUID %*u %u %u]", &olduid, &newuid) == 2 &&
+                   olduid == msgnum)
+                       *new_uid = newuid;
+
+       ptr_array_free_strings(reply);
+       g_ptr_array_free(reply, TRUE);
        return ok;
 }
 
 gint imap_cmd_envelope(SockInfo *sock, guint32 first_uid, guint32 last_uid)
 {
+       static GString *header_fields = NULL;
+
+       if (header_fields == NULL) {
+               const HeaderEntry *headers, *elem;
+
+               headers = procheader_get_headernames(FALSE);
+               header_fields = g_string_new("");
+
+               for (elem = headers; elem->name != NULL; ++elem) {
+                       gint namelen = strlen(elem->name);
+
+                       /* Header fields ending with space are not rfc822 headers */
+                       if (elem->name[namelen - 1] == ' ')
+                               continue;
+
+                       /* strip : at the of header field */
+                       if(elem->name[namelen - 1] == ':')
+                               namelen--;
+                       
+                       if (namelen <= 0)
+                               continue;
+
+                       g_string_sprintfa(header_fields, "%s%.*s",
+                                       header_fields->str[0] != '\0' ? " " : "",
+                                       namelen, elem->name);
+               }
+       }
+       
        imap_cmd_gen_send
-               (sock, "UID FETCH %d:%d (UID FLAGS RFC822.SIZE ENVELOPE)",
-                first_uid, last_uid);
+               (sock, "UID FETCH %d:%d (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER.FIELDS (%s)])",
+                first_uid, last_uid,
+                header_fields->str);
 
        return IMAP_SUCCESS;
 }
@@ -2725,11 +2944,11 @@ static gint imap_cmd_expunge(SockInfo *sock)
 static gint imap_cmd_ok(SockInfo *sock, GPtrArray *argbuf)
 {
        gint ok;
-       gchar buf[IMAPBUFSIZE];
+       gchar *buf;
        gint cmd_num;
        gchar cmd_status[IMAPBUFSIZE];
 
-       while ((ok = imap_cmd_gen_recv(sock, buf, sizeof(buf)))
+       while ((ok = imap_cmd_gen_recv(sock, &buf))
               == IMAP_SUCCESS) {
                if (buf[0] == '*' && buf[1] == ' ') {
                        if (argbuf)
@@ -2743,10 +2962,14 @@ static gint imap_cmd_ok(SockInfo *sock, GPtrArray *argbuf)
                         !strcmp(cmd_status, "OK")) {
                        if (argbuf)
                                g_ptr_array_add(argbuf, g_strdup(buf));
+                       g_free(buf);
                        return IMAP_SUCCESS;
-               } else
+               } else {
+                       g_free(buf);
                        return IMAP_ERROR;
+               }
        }
+       g_free(buf);
 
        return ok;
 }
@@ -2774,14 +2997,14 @@ static void imap_cmd_gen_send(SockInfo *sock, const gchar *format, ...)
        sock_write(sock, buf, strlen(buf));
 }
 
-static gint imap_cmd_gen_recv(SockInfo *sock, gchar *buf, gint size)
+static gint imap_cmd_gen_recv(SockInfo *sock, gchar **buf)
 {
-       if (sock_gets(sock, buf, size) == -1)
+       if ((*buf = sock_getline(sock)) == NULL)
                return IMAP_SOCKET;
 
-       strretchomp(buf);
+       strretchomp(*buf);
 
-       log_print("IMAP4< %s\n", buf);
+       log_print("IMAP4< %s\n", *buf);
 
        return IMAP_SUCCESS;
 }
@@ -2828,23 +3051,7 @@ static gchar *get_quoted(const gchar *src, gchar ch, gchar *dest, gint len)
        return (gchar *)(*p == ch ? p + 1 : p);
 }
 
-static gchar *search_array_starts(GPtrArray *array, const gchar *str)
-{
-       gint i;
-       size_t len;
-
-       g_return_val_if_fail(str != NULL, NULL);
-       len = strlen(str);
-       for (i = 0; i < array->len; i++) {
-               gchar *tmp;
-               tmp = g_ptr_array_index(array, i);
-               if (strncmp(tmp, str, len) == 0)
-                       return tmp;
-       }
-       return NULL;
-}
-
-static gchar *search_array_contain_str(GPtrArray *array, gchar *str)
+static gchar *search_array_contain_str(GPtrArray *array, const gchar *str)
 {
        gint i;
 
@@ -2859,7 +3066,7 @@ static gchar *search_array_contain_str(GPtrArray *array, gchar *str)
        return NULL;
 }
 
-static gchar *search_array_str(GPtrArray *array, gchar *str)
+static gchar *search_array_str(GPtrArray *array, const gchar *str)
 {
        gint i;
        gint len;
@@ -2896,7 +3103,7 @@ static void imap_path_separator_subst(gchar *str, gchar separator)
 
 static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
 {
-#if !HAVE_LIBJCONV
+#if !HAVE_ICONV
        return g_strdup(mutf7_str);
 #else
        static iconv_t cd = (iconv_t)-1;
@@ -2914,7 +3121,7 @@ static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
        if (cd == (iconv_t)-1) {
                cd = iconv_open(conv_get_current_charset_str(), "UTF-7");
                if (cd == (iconv_t)-1) {
-                       g_warning(_("iconv cannot convert UTF-7 to %s\n"),
+                       g_warning("iconv cannot convert UTF-7 to %s\n",
                                  conv_get_current_charset_str());
                        iconv_ok = FALSE;
                        return g_strdup(mutf7_str);
@@ -2950,7 +3157,8 @@ static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
        to_len = strlen(mutf7_str) * 5;
        to_p = to_str = g_malloc(to_len + 1);
 
-       if (iconv(cd, &norm_utf7_p, &norm_utf7_len, &to_p, &to_len) == -1) {
+       if (iconv(cd, (ICONV_CONST gchar **)&norm_utf7_p, &norm_utf7_len,
+                 &to_p, &to_len) == -1) {
                g_warning(_("iconv cannot convert UTF-7 to %s\n"),
                          conv_get_current_charset_str());
                g_string_free(norm_utf7, TRUE);
@@ -2964,12 +3172,12 @@ static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
        *to_p = '\0';
 
        return to_str;
-#endif /* !HAVE_LIBJCONV */
+#endif /* !HAVE_ICONV */
 }
 
 static gchar *imap_locale_to_modified_utf7(const gchar *from)
 {
-#if !HAVE_LIBJCONV
+#if !HAVE_ICONV
        return g_strdup(from);
 #else
        static iconv_t cd = (iconv_t)-1;
@@ -2985,7 +3193,7 @@ static gchar *imap_locale_to_modified_utf7(const gchar *from)
        if (cd == (iconv_t)-1) {
                cd = iconv_open("UTF-7", conv_get_current_charset_str());
                if (cd == (iconv_t)-1) {
-                       g_warning(_("iconv cannot convert %s to UTF-7\n"),
+                       g_warning("iconv cannot convert %s to UTF-7\n",
                                  conv_get_current_charset_str());
                        iconv_ok = FALSE;
                        return g_strdup(from);
@@ -3016,9 +3224,9 @@ static gchar *imap_locale_to_modified_utf7(const gchar *from)
                             mblen++)
                                ;
                        from_len -= mblen;
-                       if (iconv(cd, &from_tmp, &mblen,
+                       if (iconv(cd, (ICONV_CONST gchar **)&from_tmp, &mblen,
                                  &norm_utf7_p, &norm_utf7_len) == -1) {
-                               g_warning(_("iconv cannot convert %s to UTF-7\n"),
+                               g_warning("iconv cannot convert %s to UTF-7\n",
                                          conv_get_current_charset_str());
                                return g_strdup(from);
                        }
@@ -3060,7 +3268,7 @@ static gchar *imap_locale_to_modified_utf7(const gchar *from)
        g_string_free(to_str, FALSE);
 
        return to;
-#endif
+#endif /* !HAVE_ICONV */
 }
 
 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
@@ -3091,3 +3299,306 @@ static gboolean imap_rename_folder_func(GNode *node, gpointer data)
 
        return FALSE;
 }
+
+gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list)
+{
+       IMAPFolderItem *item = (IMAPFolderItem *)_item;
+       IMAPSession *session;
+       gint ok, lastuid_old, nummsgs = 0, exists, recent, unseen, uid_val, uid_next;
+       GSList *uidlist, *elem;
+       gchar *dir, *cmd_buf;
+
+       g_return_val_if_fail(folder != NULL, -1);
+       g_return_val_if_fail(item != NULL, -1);
+       g_return_val_if_fail(item->item.path != NULL, -1);
+       g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
+       g_return_val_if_fail(folder->account != NULL, -1);
+
+       session = imap_session_get(folder);
+       g_return_val_if_fail(session != NULL, -1);
+
+       ok = imap_status(session, IMAP_FOLDER(folder), item->item.path,
+                        &exists, &recent, &uid_next, &uid_val, &unseen);
+       if (ok != IMAP_SUCCESS)
+               return -1;
+
+       /* If old uid_next matches new uid_next we can be sure no message
+          was added to the folder */
+       if (uid_next == item->uid_next) {
+               nummsgs = g_slist_length(item->uid_list);
+               
+               /* If number of messages is still the same we
+                   know our caches message numbers are still valid,
+                   otherwise if the number of messages has decrease
+                  we discard our cache to start a new scan to find
+                  out which numbers have been removed */
+               if (exists == nummsgs) {
+                       *msgnum_list = g_slist_copy(item->uid_list);
+                       return nummsgs;
+               } else if (exists < nummsgs) {
+                       debug_print("Freeing imap uid cache");
+                       item->lastuid = 0;
+                       g_slist_free(item->uid_list);
+                       item->uid_list = NULL;
+               }
+       }
+       item->uid_next = uid_next;
+
+       if (exists == 0) {
+               *msgnum_list = NULL;
+               return 0;
+       }
+
+       ok = imap_select(session, IMAP_FOLDER(folder), item->item.path,
+                        &exists, &recent, &unseen, &uid_val);
+       if (ok != IMAP_SUCCESS)
+               return -1;
+
+       cmd_buf = g_strdup_printf("UID %d:*", item->lastuid + 1);
+       ok = imap_cmd_search(SESSION(session)->sock, cmd_buf, &uidlist);
+       g_free(cmd_buf);
+
+       if (ok == IMAP_SOCKET) {
+               session_destroy((Session *)session);
+               ((RemoteFolder *)folder)->session = NULL;
+               return -1;
+       }
+
+       if (ok != IMAP_SUCCESS) {
+               gint i;
+               GPtrArray *argbuf;
+
+               argbuf = g_ptr_array_new();
+
+               cmd_buf = g_strdup_printf("UID FETCH %d:* (UID)", item->lastuid + 1);
+               imap_cmd_gen_send(SESSION(session)->sock, cmd_buf);
+               g_free(cmd_buf);
+               ok = imap_cmd_ok(SESSION(session)->sock, argbuf);
+               if (ok != IMAP_SUCCESS) {
+                       ptr_array_free_strings(argbuf);
+                       g_ptr_array_free(argbuf, TRUE);
+                       return -1;
+               }
+       
+               for(i = 0; i < argbuf->len; i++) {
+                       int ret, msgnum;
+       
+                       if((ret = sscanf(g_ptr_array_index(argbuf, i), 
+                                   "%*d FETCH (UID %d)", &msgnum)) == 1)
+                               uidlist = g_slist_prepend(uidlist, GINT_TO_POINTER(msgnum));
+               }
+               ptr_array_free_strings(argbuf);
+               g_ptr_array_free(argbuf, TRUE);
+       }
+
+       lastuid_old = item->lastuid;
+       *msgnum_list = g_slist_copy(item->uid_list);
+       nummsgs = g_slist_length(*msgnum_list);
+       debug_print("Got %d uids from cache\n", g_slist_length(item->uid_list));
+
+       for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
+               guint msgnum;
+
+               msgnum = GPOINTER_TO_INT(elem->data);
+               if (msgnum > lastuid_old) {
+                       *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
+                       item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
+                       nummsgs++;
+
+                       if(msgnum > item->lastuid)
+                               item->lastuid = msgnum;
+               }
+       }
+       g_slist_free(uidlist);
+
+       if (nummsgs != exists) {
+               /* Cache contains more messages then folder, we have cached
+                   an old UID of a message that was removed and new messages
+                   have been added too, otherwise the uid_next check would
+                  not have failed */
+               debug_print("Freeing imap uid cache");
+               item->lastuid = 0;
+               g_slist_free(item->uid_list);
+               item->uid_list = NULL;
+
+               g_slist_free(*msgnum_list);
+
+               return imap_get_num_list(folder, _item, msgnum_list);
+       }
+
+       dir = folder_item_get_path((FolderItem *)item);
+       debug_print("removing old messages from %s\n", dir);
+       remove_numbered_files_not_in_list(dir, *msgnum_list);
+       g_free(dir);
+
+       return nummsgs;
+}
+
+static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
+{
+       MsgInfo *msginfo;
+       MsgFlags flags;
+
+       flags.perm_flags = MSG_NEW|MSG_UNREAD;
+       flags.tmp_flags = 0;
+
+       g_return_val_if_fail(item != NULL, NULL);
+       g_return_val_if_fail(file != NULL, NULL);
+
+       if (item->stype == F_QUEUE) {
+               MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
+       } else if (item->stype == F_DRAFT) {
+               MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
+       }
+
+       msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
+       if (!msginfo) return NULL;
+
+       msginfo->folder = item;
+
+       return msginfo;
+}
+
+static int compare_uint(gconstpointer a, gconstpointer b)
+{
+       return a-b;
+}
+
+GSList *imap_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
+{
+       IMAPSession *session;
+       GSList *sorted_list, *elem, *ret = NULL;
+       gint ok, startnum, lastnum;
+
+       g_return_val_if_fail(folder != NULL, NULL);
+       g_return_val_if_fail(item != NULL, NULL);
+       g_return_val_if_fail(msgnum_list != NULL, NULL);
+
+       session = imap_session_get(folder);
+       g_return_val_if_fail(session != NULL, NULL);
+
+       ok = imap_select(session, IMAP_FOLDER(folder), item->path,
+                        NULL, NULL, NULL, NULL);
+       if (ok != IMAP_SUCCESS)
+               return NULL;
+
+       sorted_list = g_slist_sort(g_slist_copy(msgnum_list), compare_uint);
+
+       startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
+
+       for (elem = sorted_list;; elem = g_slist_next(elem)) {
+               guint num;
+
+               if (elem)
+                       num = GPOINTER_TO_INT(elem->data);
+
+               if (num > lastnum + 1 || elem == NULL) {
+                       if (!(item->stype == F_QUEUE || item->stype == F_DRAFT)) {
+                               ret = g_slist_concat(ret,
+                                       imap_get_uncached_messages(
+                                               session, item, startnum, lastnum));
+                       } else {
+                               int i;
+                               for (i = startnum; i <= lastnum; ++i) {
+                                       gchar *file;
+                       
+                                       file = imap_fetch_msg(folder, item, i);
+                                       if (file != NULL) {
+                                               MsgInfo *msginfo = imap_parse_msg(file, item);
+                                               if (msginfo != NULL) {
+                                                       msginfo->msgnum = i;
+                                                       ret = g_slist_append(ret, msginfo);
+                                               }
+                                               g_free(file);
+                                       }
+                               }
+                       }
+
+                       if (elem == NULL)
+                               break;
+
+                       startnum = num;
+               }
+               lastnum = num;
+       }
+
+       g_slist_free(sorted_list);
+
+       return ret;
+}
+
+MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
+{
+       IMAPSession *session;
+       MsgInfo *msginfo = NULL;
+       gint ok;
+
+       g_return_val_if_fail(folder != NULL, NULL);
+       g_return_val_if_fail(item != NULL, NULL);
+
+       session = imap_session_get(folder);
+       g_return_val_if_fail(session != NULL, NULL);
+
+       ok = imap_select(session, IMAP_FOLDER(folder), item->path,
+                        NULL, NULL, NULL, NULL);
+       if (ok != IMAP_SUCCESS)
+               return NULL;
+
+       if (!(item->stype == F_QUEUE || item->stype == F_DRAFT)) {
+               GSList *list;
+
+               list = imap_get_uncached_messages(session, item, uid, uid);
+               if (list) {
+                       msginfo = (MsgInfo *)list->data;
+                       list->data = NULL;
+               }
+               procmsg_msg_list_free(list);
+       } else {
+               gchar *file;
+
+               file = imap_fetch_msg(folder, item, uid);
+               if (file != NULL) {
+                       msginfo = imap_parse_msg(file, item);
+                       if (msginfo != NULL)
+                               msginfo->msgnum = uid;
+                       g_free(file);
+               }
+       }
+       
+       return msginfo;
+}
+
+gboolean imap_check_msgnum_validity(Folder *folder, FolderItem *_item)
+{
+       IMAPSession *session;
+       IMAPFolderItem *item = (IMAPFolderItem *)_item;
+       gint ok, exists = 0, recent = 0, unseen = 0;
+       guint32 uid_next, uid_validity = 0;
+       
+       g_return_val_if_fail(folder != NULL, FALSE);
+       g_return_val_if_fail(item != NULL, FALSE);
+       g_return_val_if_fail(item->item.folder != NULL, FALSE);
+       g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
+
+       session = imap_session_get(folder);
+       g_return_val_if_fail(session != NULL, FALSE);
+
+       ok = imap_status(session, IMAP_FOLDER(folder), item->item.path,
+                        &exists, &recent, &uid_next, &uid_validity, &unseen);
+       if (ok != IMAP_SUCCESS)
+               return FALSE;
+
+       if(item->item.mtime == uid_validity)
+               return TRUE;
+
+       debug_print("Freeing imap uid cache");
+       item->lastuid = 0;
+       g_slist_free(item->uid_list);
+       item->uid_list = NULL;
+               
+       item->item.mtime = uid_validity;
+
+       imap_delete_all_cached_messages((FolderItem *)item);
+
+       return FALSE;
+}