0.8.11claws26
[claws.git] / src / imap.c
index 70b5f20f00f96ddac4d59db06c18e8e7b90c5d10..cc877b3b74a728d36c161948f6b51f9fb97dc613 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"
@@ -43,7 +43,6 @@
 #include "procmsg.h"
 #include "procheader.h"
 #include "folder.h"
-#include "statusbar.h"
 #include "prefs_account.h"
 #include "codeconv.h"
 #include "utils.h"
@@ -51,7 +50,7 @@
 #include "log.h"
 
 #define IMAP4_PORT     143
-#if USE_SSL
+#if USE_OPENSSL
 #define IMAPS_PORT     993
 #endif
 
@@ -75,6 +74,7 @@ struct _IMAPFolderItem
        FolderItem item;
 
        guint lastuid;
+       guint uid_next;
        GSList *uid_list;
 };
 
@@ -96,7 +96,8 @@ static gint imap_scan_tree_recursive  (IMAPSession    *session,
                                         FolderItem     *item);
 static GSList *imap_parse_list         (Folder         *folder,
                                         IMAPSession    *session,
-                                        const gchar    *real_path);
+                                        const gchar    *real_path,
+                                        gchar          *separator);
 
 static void imap_create_missing_folders        (Folder                 *folder);
 static FolderItem *imap_create_special_folder
@@ -108,22 +109,20 @@ 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,
                                         SSLType         ssl_type);
@@ -132,7 +131,7 @@ static SockInfo *imap_open          (const gchar    *server,
                                         gushort         port);
 #endif
 
-#if USE_SSL
+#if USE_OPENSSL
 static SockInfo *imap_open_tunnel(const gchar *server,
                                  const gchar *tunnelcmd,
                                  SSLType ssl_type);
@@ -141,7 +140,7 @@ static SockInfo *imap_open_tunnel(const gchar *server,
                                  const gchar *tunnelcmd);
 #endif
 
-#if USE_SSL
+#if USE_OPENSSL
 static SockInfo *imap_init_sock(SockInfo *sock, SSLType         ssl_type);
 #else
 static SockInfo *imap_init_sock(SockInfo *sock);
@@ -159,9 +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,
@@ -173,6 +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,
@@ -189,8 +187,11 @@ 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,
@@ -241,12 +242,14 @@ static gint imap_cmd_search       (SockInfo       *sock,
 static gint imap_cmd_fetch     (SockInfo       *sock,
                                 guint32         uid,
                                 const gchar    *filename);
-static gint imap_cmd_append    (SockInfo       *sock,
+static gint imap_cmd_append    (IMAPSession    *session,
                                 const gchar    *destfolder,
-                                const gchar    *file);
-static gint imap_cmd_copy      (SockInfo       *sock,
-                                guint32         uid,
-                                const gchar    *destfolder);
+                                const gchar    *file,
+                                gint32         *newuid);
+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,
@@ -258,8 +261,7 @@ 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,
@@ -271,11 +273,9 @@ 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);
 
@@ -287,17 +287,70 @@ static gboolean imap_rename_folder_func           (GNode          *node,
 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);
+void imap_change_flags                         (Folder         *folder,
+                                                FolderItem     *item,
+                                                MsgInfo        *msginfo,
+                                                MsgPermFlags   newflags);
+
+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,
+       imap_change_flags,
+};
+
+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;
@@ -318,38 +371,7 @@ void imap_folder_destroy(Folder *folder)
 static void imap_folder_init(Folder *folder, const gchar *name,
                             const gchar *path)
 {
-       folder->type = F_IMAP;
-
        folder_remote_folder_init((Folder *)folder, name, path);
-
-/*
-       folder->get_msg_list        = imap_get_msg_list;
-*/
-       folder->item_new              = imap_folder_item_new;
-       folder->item_destroy          = imap_folder_item_destroy;
-       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_msgs           = imap_remove_msgs;
-       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;
-       folder->destroy               = imap_folder_destroy;
-       folder->check_msgnum_validity = imap_check_msgnum_validity;
-
-       folder->get_num_list          = imap_get_num_list;
-       folder->get_msginfo           = imap_get_msginfo;
 }
 
 static FolderItem *imap_folder_item_new(Folder *folder)
@@ -358,6 +380,7 @@ static FolderItem *imap_folder_item_new(Folder *folder)
        
        item = g_new0(IMAPFolderItem, 1);
        item->lastuid = 0;
+       item->uid_next = 0;
        item->uid_list = NULL;
 
        return (FolderItem *)item;
@@ -378,6 +401,7 @@ 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;
        
@@ -396,13 +420,14 @@ static void imap_reset_uid_lists(Folder *folder)
 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 == SSL_TUNNEL
                ? IMAPS_PORT : IMAP4_PORT;
@@ -411,18 +436,31 @@ static IMAPSession *imap_session_get(Folder *folder)
                : 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);
-                       imap_reset_uid_lists(folder);
-               }
-               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
@@ -432,30 +470,36 @@ 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 (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));
-                       imap_reset_uid_lists(folder);
+       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 (rfolder->session)
-               rfolder->session->last_access_time = time(NULL);
-       statusbar_pop_all();
-       return IMAP_SESSION(rfolder->session);
+       rfolder->session = session;
+       if (session) {
+               session->last_access_time = time(NULL);
+       }
+       return IMAP_SESSION(session);
 }
 
 Session *imap_session_new(const PrefsAccount *account)
@@ -463,16 +507,15 @@ 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... */ 
        SSLType ssl_type;
 
        port = account->set_imapport ? account->imapport
-               : account->ssl_imap ? IMAPS_PORT : IMAP4_PORT;
-       ssl_type = 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;
@@ -480,7 +523,7 @@ Session *imap_session_new(const PrefsAccount *account)
 
        if (account->set_tunnelcmd) {
                log_message(_("creating tunneled IMAP4 connection\n"));
-#if USE_SSL
+#if USE_OPENSSL
                if ((imap_sock = imap_open_tunnel(account->recv_server, 
                                                  account->tunnelcmd,
                                                  ssl_type)) == NULL)
@@ -495,7 +538,7 @@ 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,
                                           ssl_type)) == NULL)
 #else
@@ -505,31 +548,14 @@ 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;
        SESSION(session)->server           = g_strdup(account->recv_server);
        SESSION(session)->sock             = imap_sock;
@@ -540,13 +566,40 @@ Session *imap_session_new(const PrefsAccount *account)
 
        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_authenticate(IMAPSession *session, const PrefsAccount *account)
+{
+       gchar *pass;
+
+       g_return_if_fail(account->userid != NULL);
+
+       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);
+               return;
+       }
+
+       session->authenticated = TRUE;
+}
+
 void imap_session_destroy(Session *session)
 {
        sock_close(session->sock);
@@ -554,6 +607,8 @@ void imap_session_destroy(Session *session)
 
        g_free(IMAP_SESSION(session)->mbox);
 
+       g_strfreev(IMAP_SESSION(session)->capability);
+
        session_list = g_list_remove(session_list, session);
 }
 
@@ -567,102 +622,6 @@ void imap_session_destroy_all(void)
        }
 }
 
-#define THROW goto catch
-
-GSList *imap_get_msg_list(Folder *folder, FolderItem *item, gboolean use_cache)
-{
-       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_msg_list(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;
-
-               mlist = procmsg_read_cache(item, FALSE);
-               procmsg_set_flags(mlist, item);
-               cache_last = procmsg_get_last_num_in_msg_list(mlist);
-
-               /* 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;
-               }
-
-               item->mtime = uid_validity;
-
-               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;
-       }
-
-       if (begin > 0 && begin <= last_uid) {
-               GSList *newlist;
-               newlist = imap_get_uncached_messages(session, item,
-                                                    begin, last_uid);
-               mlist = g_slist_concat(mlist, newlist);
-       }
-
-       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;
@@ -691,9 +650,8 @@ 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;
        }
@@ -701,10 +659,8 @@ gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint 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;
        }
@@ -717,9 +673,7 @@ 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;
+       gint ok, newuid;
 
        g_return_val_if_fail(folder != NULL, -1);
        g_return_val_if_fail(dest != NULL, -1);
@@ -728,20 +682,12 @@ 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);
+       ok = imap_cmd_append(session, destdir, file, &newuid);
        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;
        }
 
@@ -750,7 +696,7 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
                        FILE_OP_ERROR(file, "unlink");
        }
 
-       return uid_next;
+       return newuid;
 }
 
 static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
@@ -758,12 +704,12 @@ static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
 {
        gchar *destdir;
        IMAPSession *session;
-       gint messages, recent, unseen;
-       guint32 uid_next, uid_validity;
+       IMAPFlags iflags = 0;
+       guint32 newuid = 0;
        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);
 
@@ -771,15 +717,7 @@ 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"));
-               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 copy message\n"));
+               g_warning("the src folder is identical to the dest.\n");
                return -1;
        }
 
@@ -788,7 +726,6 @@ static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
        /* ensure source folder selected */
        ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
                         NULL, NULL, NULL, NULL);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS)
                return -1;
         
@@ -801,7 +738,7 @@ static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
                            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,
@@ -809,15 +746,30 @@ 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 uid_next;
+               return newuid;
        else
                return -1;
 }
 
+#if 0
 static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest, 
                                        GSList *msglist,
                                        gboolean remove_source)
@@ -841,14 +793,13 @@ 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);
-               statusbar_pop_all();
         
                if (remove_source)
                        debug_print("Moving message %s%c%d to %s ...\n",
@@ -859,8 +810,7 @@ static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
                                    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
@@ -873,13 +823,13 @@ 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)
 {
@@ -909,6 +859,7 @@ gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
        return ret;
 }
 
+#if 0
 gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest, 
                              GSList *msglist)
 {
@@ -932,6 +883,7 @@ gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest,
 
        return ret;
 }
+#endif
 
 gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 {
@@ -956,6 +908,7 @@ 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)
 {
@@ -980,6 +933,7 @@ gint imap_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
 
        return ret;
 }
+#endif
 
 gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
 {
@@ -988,7 +942,7 @@ gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
        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);
@@ -996,21 +950,18 @@ gint imap_remove_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)
                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;
@@ -1034,7 +985,7 @@ gint imap_remove_msgs(Folder *folder, FolderItem *item, GSList *msglist)
        guint32 uid;
 
        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);
        g_return_val_if_fail(msglist != NULL, -1);
 
@@ -1043,7 +994,6 @@ gint imap_remove_msgs(Folder *folder, FolderItem *item, GSList *msglist)
 
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
                         NULL, NULL, NULL, NULL);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS)
                return ok;
 
@@ -1053,7 +1003,6 @@ gint imap_remove_msgs(Folder *folder, FolderItem *item, GSList *msglist)
                ok = imap_set_message_flags
                        (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
                         uid, uid, IMAP_FLAG_DELETED, TRUE);
-               statusbar_pop_all();
                if (ok != IMAP_SUCCESS) {
                        log_warning(_("can't set deleted flags: %d\n"), uid);
                        return ok;
@@ -1061,7 +1010,6 @@ gint imap_remove_msgs(Folder *folder, FolderItem *item, GSList *msglist)
        }
 
        ok = imap_cmd_expunge(SESSION(session)->sock);
-       statusbar_pop_all();
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't expunge\n"));
                return ok;
@@ -1096,7 +1044,6 @@ 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)
@@ -1105,14 +1052,12 @@ 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;
@@ -1147,7 +1092,6 @@ 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;
@@ -1237,7 +1181,7 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
                          wildcard_path);
 
        strtailchomp(real_path, separator);
-       item_list = imap_parse_list(folder, 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) {
@@ -1279,11 +1223,12 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
        return IMAP_SUCCESS;
 }
 
-static GSList *imap_parse_list(Folder *folder, 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;
@@ -1319,11 +1264,13 @@ static GSList *imap_parse_list(Folder *folder, IMAPSession *session, const gchar
                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++;
@@ -1332,12 +1279,12 @@ static GSList *imap_parse_list(Folder *folder, IMAPSession *session, const gchar
                                            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;
 
@@ -1358,7 +1305,6 @@ static GSList *imap_parse_list(Folder *folder, IMAPSession *session, const gchar
        }
 
        g_string_free(str, TRUE);
-       statusbar_pop_all();
 
        return item_list;
 }
@@ -1416,12 +1362,12 @@ 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
@@ -1482,11 +1428,11 @@ 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;
                }
@@ -1499,11 +1445,11 @@ 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);
@@ -1556,7 +1502,6 @@ 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;
@@ -1574,7 +1519,6 @@ 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);
@@ -1633,14 +1577,12 @@ 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);
@@ -1670,7 +1612,7 @@ 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)
@@ -1729,50 +1671,13 @@ 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 %u - %u ... ",
-                   first_uid, last_uid);
-
-       dir = folder_item_get_path(item);
-       if (is_dir_exist(dir))
-               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...\n");
 
@@ -1784,7 +1689,7 @@ static void imap_delete_all_cached_messages(FolderItem *item)
        debug_print("done.\n");
 }
 
-#if USE_SSL
+#if USE_OPENSSL
 static SockInfo *imap_open_tunnel(const gchar *server,
                           const gchar *tunnelcmd,
                           SSLType ssl_type)
@@ -1799,7 +1704,7 @@ static SockInfo *imap_open_tunnel(const gchar *server,
                log_warning(_("Can't establish IMAP4 session with: %s\n"),
                            server);
                return NULL;
-#if USE_SSL
+#if USE_OPENSSL
        return imap_init_sock(sock, ssl_type);
 #else
        return imap_init_sock(sock);
@@ -1807,7 +1712,7 @@ static SockInfo *imap_open_tunnel(const gchar *server,
 }
 
 
-#if USE_SSL
+#if USE_OPENSSL
 static SockInfo *imap_open(const gchar *server, gushort port,
                           SSLType ssl_type)
 #else
@@ -1822,7 +1727,7 @@ static SockInfo *imap_open(const gchar *server, gushort port)
                return NULL;
        }
 
-#if USE_SSL
+#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);
@@ -1835,14 +1740,14 @@ static SockInfo *imap_open(const gchar *server, gushort port)
 #endif
 }
 
-#if USE_SSL
+#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_SSL
+#if USE_OPENSSL
        if (ssl_type == SSL_STARTTLS) {
                gint ok;
 
@@ -1932,6 +1837,11 @@ 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"));
@@ -1939,6 +1849,11 @@ 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])
@@ -1949,6 +1864,32 @@ static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
        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,
                                                    const gchar *path)
 {
@@ -2111,7 +2052,7 @@ static gchar *imap_get_header(SockInfo *sock, gchar *cur_pos, gchar **headers,
                g_free(nextline);
        } while (block_len < len);
 
-       debug_print("IMAP4< [contents of RFC822.HEADER]\n");
+       debug_print("IMAP4< [contents of BODY.PEEK[HEADER.FIELDS (...)]]\n");
 
        *headers = g_strndup(cur_pos, len);
        cur_pos += len;
@@ -2220,10 +2161,24 @@ static MsgInfo *imap_parse_envelope(SockInfo *sock, FolderItem *item,
                } else if (!strncmp(cur_pos, "RFC822.SIZE ", 12)) {
                        cur_pos += 12;
                        size = strtol(cur_pos, &cur_pos, 10);
-               } else if (!strncmp(cur_pos, "RFC822.HEADER ", 14)) {
+               } else if (!strncmp(cur_pos, "BODY[HEADER.FIELDS ", 19)) {
                        gchar *headers;
 
-                       cur_pos += 14;
+                       cur_pos += 19;
+                       if (*cur_pos != '(') {
+                               g_warning("*cur_pos != '('\n");
+                               procmsg_msginfo_free(msginfo);
+                               return NULL;
+                       }
+                       cur_pos++;
+                       PARSE_ONE_ELEMENT(')');
+                       if (*cur_pos != ']') {
+                               g_warning("*cur_pos != ']'\n");
+                               procmsg_msginfo_free(msginfo);
+                               return NULL;
+                       }
+                       cur_pos++;
+
                        cur_pos = imap_get_header(sock, cur_pos, &headers,
                                                  line_str);
                        msginfo = procheader_parse_str(headers, flags, FALSE, FALSE);
@@ -2252,16 +2207,19 @@ 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) {
@@ -2285,12 +2243,11 @@ 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;
@@ -2374,36 +2331,6 @@ 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,
@@ -2505,11 +2432,52 @@ 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");
@@ -2680,10 +2648,49 @@ 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;
@@ -2692,10 +2699,12 @@ 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;
        }
@@ -2703,35 +2712,53 @@ 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;
 }
 
-static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
-                           const gchar *file)
+static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
+                           const gchar *file, gint32 *new_uid)
 {
        gint ok;
-       gint size;
+       gint size, newuid;
        gchar *destfolder_;
-       gchar buf[BUFFSIZE];
+       gchar buf[BUFFSIZE], *imapbuf;
        FILE *fp;
+       GPtrArray *reply;
+       gchar *okmsginfo;
 
        g_return_val_if_fail(file != NULL, IMAP_ERROR);
 
@@ -2741,22 +2768,24 @@ static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
                return -1;
        }
        QUOTE_IF_REQUIRED(destfolder_, destfolder);
-       imap_cmd_gen_send(sock, "APPEND %s (\\Seen) {%d}", destfolder_, size);
+       imap_cmd_gen_send(SESSION(session)->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(SESSION(session)->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...)"));
 
        while (fgets(buf, sizeof(buf), fp) != NULL) {
                strretchomp(buf);
-               if (sock_puts(sock, buf) < 0) {
+               if (sock_puts(SESSION(session)->sock, buf) < 0) {
                        fclose(fp);
-                       sock_close(sock);
+                       sock_close(SESSION(session)->sock);
                        return -1;
                }
        }
@@ -2764,40 +2793,102 @@ static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
        if (ferror(fp)) {
                FILE_OP_ERROR(file, "fgets");
                fclose(fp);
-               sock_close(sock);
+               sock_close(SESSION(session)->sock);
                return -1;
        }
 
-       sock_puts(sock, "");
+       sock_puts(SESSION(session)->sock, "");
 
        fclose(fp);
-       return imap_cmd_ok(sock, NULL);
+
+       reply = g_ptr_array_new();
+
+       *new_uid = 0;
+       ok = imap_cmd_ok(SESSION(session)->sock, reply);
+       if (ok != IMAP_SUCCESS)
+               log_warning(_("can't append message to %s\n"), destfolder_);
+       else if (
+           (new_uid != NULL) && 
+           (imap_has_capability(session, "UIDPLUS") && reply->len > 0) &&
+           ((okmsginfo = g_ptr_array_index(reply, reply->len - 1)) != NULL) &&
+           (sscanf(okmsginfo, "%*u OK [APPENDUID %*u %u]", &newuid) == 1)) {
+               *new_uid = newuid;
+       }
+
+       ptr_array_free_strings(reply);
+       g_ptr_array_free(reply, TRUE);
+       return ok;
 }
 
-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)
 {
        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();
 
+       *new_uid = 0;
+       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 RFC822.HEADER)",
-                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;
 }
@@ -2835,11 +2926,11 @@ 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)
@@ -2853,10 +2944,14 @@ 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;
 }
@@ -2884,14 +2979,14 @@ 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;
 }
@@ -2938,23 +3033,7 @@ 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;
 
@@ -2969,7 +3048,7 @@ 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;
@@ -3006,7 +3085,7 @@ 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;
@@ -3024,7 +3103,7 @@ 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);
@@ -3060,7 +3139,8 @@ 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);
@@ -3074,12 +3154,12 @@ 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;
@@ -3095,7 +3175,7 @@ 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);
@@ -3126,9 +3206,9 @@ 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);
                        }
@@ -3170,7 +3250,7 @@ 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)
@@ -3202,20 +3282,12 @@ static gboolean imap_rename_folder_func(GNode *node, gpointer data)
        return FALSE;
 }
 
-gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list)
+static gint get_list_of_uids(Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
 {
-       IMAPFolderItem *item = (IMAPFolderItem *)_item;
+       gint ok, nummsgs = 0, lastuid_old;
        IMAPSession *session;
-       gint ok, i, lastuid_old, nummsgs = 0;
-       GPtrArray *argbuf;
-       gchar *cmdbuf = NULL;
-       gchar *dir;
-
-       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->type == F_IMAP, -1);
-       g_return_val_if_fail(folder->account != NULL, -1);
+       GSList *uidlist, *elem;
+       gchar *cmd_buf;
 
        session = imap_session_get(folder);
        g_return_val_if_fail(session != NULL, -1);
@@ -3225,38 +3297,133 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list)
        if (ok != IMAP_SUCCESS)
                return -1;
 
-       argbuf = g_ptr_array_new();
-       if(item->lastuid) {
-               cmdbuf = g_strdup_printf("UID FETCH %d:* (UID)", (item->lastuid + 1));
-       } else {
-               cmdbuf = g_strdup("FETCH 1:* (UID)");
+       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;
        }
-       imap_cmd_gen_send(SESSION(session)->sock, cmdbuf);
-       g_free(cmdbuf);
-       ok = imap_cmd_ok(SESSION(session)->sock, argbuf);
+
        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);
-               return -1;
        }
 
        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(i = 0; i < argbuf->len; i++) {
-               int ret, msgidx, msgnum;
-       
-               if((ret = sscanf(g_ptr_array_index(argbuf, i), "%d FETCH (UID %d)", &msgidx, &msgnum)) == 2) {
-                       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;
-                       }
+
+       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);
+
+       return nummsgs;
+}
+
+gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list)
+{
+       IMAPFolderItem *item = (IMAPFolderItem *)_item;
+       IMAPSession *session;
+       gint ok, nummsgs = 0, exists, recent, unseen, uid_val, uid_next;
+       GSList *uidlist;
+       gchar *dir;
+
+       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;
+       }
+
+       nummsgs = get_list_of_uids(folder, item, &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);
+
+               nummsgs = get_list_of_uids(folder, item, &uidlist);
+       }
+
+       *msgnum_list = uidlist;
 
        dir = folder_item_get_path((FolderItem *)item);
        debug_print("removing old messages from %s\n", dir);
@@ -3291,11 +3458,79 @@ static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *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);
@@ -3303,6 +3538,11 @@ MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
        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;
 
@@ -3337,7 +3577,7 @@ gboolean imap_check_msgnum_validity(Folder *folder, FolderItem *_item)
        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(item->item.folder->type == F_IMAP, 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);
@@ -3361,3 +3601,55 @@ gboolean imap_check_msgnum_validity(Folder *folder, FolderItem *_item)
 
        return FALSE;
 }
+
+void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
+{
+       IMAPSession *session;
+       IMAPFlags flags_set = 0, flags_unset = 0;
+       gint ok = IMAP_SUCCESS;
+
+       g_return_if_fail(folder != NULL);
+       g_return_if_fail(folder->class == &imap_class);
+       g_return_if_fail(item != NULL);
+       g_return_if_fail(item->folder == folder);
+       g_return_if_fail(msginfo != NULL);
+       g_return_if_fail(msginfo->folder == item);
+
+       session = imap_session_get(folder);
+       if (!session) return;
+
+       if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
+           NULL, NULL, NULL, NULL)) != IMAP_SUCCESS)
+               return;
+
+       if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
+               flags_set |= IMAP_FLAG_FLAGGED;
+       if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
+               flags_unset |= IMAP_FLAG_FLAGGED;
+
+       if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
+               flags_unset |= IMAP_FLAG_SEEN;
+       if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
+               flags_set |= IMAP_FLAG_SEEN;
+
+       if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
+               flags_set |= IMAP_FLAG_ANSWERED;
+       if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
+               flags_set |= IMAP_FLAG_ANSWERED;
+
+       if (flags_set) {
+               ok = imap_set_message_flags(session, msginfo->msgnum,
+                                           msginfo->msgnum, flags_set, TRUE);
+               if (ok != IMAP_SUCCESS) return;
+       }
+
+       if (flags_unset) {
+               ok = imap_set_message_flags(session, msginfo->msgnum,
+                                           msginfo->msgnum, flags_unset, FALSE);
+               if (ok != IMAP_SUCCESS) return;
+       }
+
+       msginfo->flags.perm_flags = newflags;
+
+       return;
+}