2006-06-29 [colin] 2.3.1cvs36
[claws.git] / src / imap.c
index 8b7d7c985c296187f95065b96897b5bd8d7067f0..4cee841fac9bd3a48a4dc11e4d2476f907789d10 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2005 Hiroyuki Yamamoto
+ * Copyright (C) 1999-2006 Hiroyuki Yamamoto and the Sylpheed-Claws team
  *
  * 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
@@ -30,6 +30,7 @@
 #include "imap.h"
 #include "imap_gtk.h"
 #include "inc.h"
+#include "xml.h"
 
 #ifdef HAVE_LIBETPAN
 
@@ -107,6 +108,7 @@ struct _IMAPSession
        gboolean folder_content_changed;
        guint exists;
        Folder * folder;
+       gboolean busy;
 };
 
 struct _IMAPNameSpace
@@ -162,8 +164,14 @@ struct _IMAPFolderItem
        guint32 c_uid_next;
        guint32 c_uid_validity;
        gint c_unseen;
+
+       GHashTable *flags_set_table;
+       GHashTable *flags_unset_table;
 };
 
+static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
+static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
+
 static void imap_folder_init           (Folder         *folder,
                                         const gchar    *name,
                                         const gchar    *path);
@@ -381,7 +389,7 @@ static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 
 /* data types conversion libetpan <-> sylpheed */
 static GSList * imap_list_from_lep(IMAPFolder * folder,
-                                  clist * list, const gchar * real_path);
+                                  clist * list, const gchar * real_path, gboolean all);
 static GSList * imap_get_lep_set_from_numlist(MsgNumberList *numlist);
 static GSList * imap_get_lep_set_from_msglist(MsgInfoList *msglist);
 static GSList * imap_uid_list_from_lep(clist * list);
@@ -391,12 +399,10 @@ static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 static void imap_lep_set_free(GSList *seq_list);
 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFlags flags);
 
-
-static GHashTable *flags_set_table = NULL;
-static GHashTable *flags_unset_table = NULL;
 typedef struct _hashtable_data {
        IMAPSession *session;
        GSList *msglist;
+       IMAPFolderItem *item;
 } hashtable_data;
 
 static FolderClass imap_class;
@@ -434,6 +440,10 @@ FolderClass *imap_get_class(void)
                imap_class.close = imap_close;
                imap_class.get_num_list = imap_get_num_list;
                imap_class.scan_required = imap_scan_required;
+               imap_class.set_xml = folder_set_xml;
+               imap_class.get_xml = folder_get_xml;
+               imap_class.item_set_xml = imap_item_set_xml;
+               imap_class.item_get_xml = imap_item_get_xml;
 
                /* Message functions */
                imap_class.get_msginfo = imap_get_msginfo;
@@ -473,16 +483,9 @@ static Folder *imap_folder_new(const gchar *name, const gchar *path)
 
 static void imap_folder_destroy(Folder *folder)
 {
-       gchar *dir;
-
        while (imap_folder_get_refcnt(folder) > 0)
                gtk_main_iteration();
        
-       dir = imap_folder_get_path(folder);
-       if (is_dir_exist(dir))
-               remove_dir_recursive(dir);
-       g_free(dir);
-
        folder_remote_folder_destroy(REMOTE_FOLDER(folder));
        imap_done(folder);
 }
@@ -520,7 +523,6 @@ 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;
        
@@ -582,6 +584,9 @@ static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass
        imap_get_capabilities(session);
 
        switch(type) {
+       case IMAP_AUTH_ANON:
+               ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
+               break;
        case IMAP_AUTH_CRAM_MD5:
                ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
                break;
@@ -590,8 +595,10 @@ static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass
                break;
        default:
                debug_print("capabilities:\n"
+                               "\t ANONYMOUS %d\n"
                                "\t CRAM-MD5 %d\n"
                                "\t LOGIN %d\n", 
+                       imap_has_capability(session, "ANONYMOUS"),
                        imap_has_capability(session, "CRAM-MD5"),
                        imap_has_capability(session, "LOGIN"));
                if (imap_has_capability(session, "CRAM-MD5"))
@@ -660,28 +667,50 @@ static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *sess
        return session;
 }
 
+#define lock_session() {\
+       debug_print("locking session\n"); \
+       session->busy = TRUE;\
+}
+
+#define unlock_session() {\
+       debug_print("unlocking session\n"); \
+       session->busy = FALSE;\
+}
+
 static IMAPSession *imap_session_get(Folder *folder)
 {
        RemoteFolder *rfolder = REMOTE_FOLDER(folder);
        IMAPSession *session = NULL;
+       static time_t last_failure = 0;
 
        g_return_val_if_fail(folder != NULL, NULL);
        g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
        g_return_val_if_fail(folder->account != NULL, NULL);
        
-       if (prefs_common.work_offline && !inc_offline_should_override()) {
+       if (prefs_common.work_offline && 
+           !inc_offline_should_override(
+               _("Sylpheed-Claws needs network access in order "
+                 "to access the IMAP server."))) {
                return NULL;
        }
 
        /* Make sure we have a session */
        if (rfolder->session != NULL) {
                session = IMAP_SESSION(rfolder->session);
+               /* don't do that yet... 
+               if (session->busy) {
+                       return NULL;
+               } */
        } else {
                imap_reset_uid_lists(folder);
+               if (time(NULL) - last_failure <= 2)
+                       return NULL;
                session = imap_session_new(folder, folder->account);
        }
-       if(session == NULL)
+       if(session == NULL) {
+               last_failure = time(NULL);
                return NULL;
+       }
 
        /* Make sure session is authenticated */
        if (!IMAP_SESSION(session)->authenticated)
@@ -690,15 +719,10 @@ static IMAPSession *imap_session_get(Folder *folder)
        if (!IMAP_SESSION(session)->authenticated) {
                session_destroy(SESSION(session));
                rfolder->session = NULL;
+               last_failure = time(NULL);
                return NULL;
        }
 
-#if 0
-       /* Make sure we have parsed the IMAP namespace */
-       imap_parse_namespace(IMAP_SESSION(session),
-                            IMAP_FOLDER(folder));
-#endif
-
        /* 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
@@ -744,10 +768,9 @@ static IMAPSession *imap_session_new(Folder * folder,
                          "Do you want to continue connecting to this "
                          "server? The communication would not be "
                          "secure."),
-                         _("Con_tinue connecting"), 
-                         GTK_STOCK_CANCEL, NULL,
-                         FALSE, NULL, ALERT_WARNING,
-                         G_ALERTALTERNATE) != G_ALERTDEFAULT)
+                         GTK_STOCK_CANCEL, _("Con_tinue connecting"), 
+                         NULL, FALSE, NULL, ALERT_WARNING,
+                         G_ALERTDEFAULT) != G_ALERTALTERNATE)
                        return NULL;
        }
        port = account->set_imapport ? account->imapport
@@ -839,28 +862,41 @@ static IMAPSession *imap_session_new(Folder * folder,
 static void imap_session_authenticate(IMAPSession *session, 
                                      const PrefsAccount *account)
 {
-       gchar *pass;
+       gchar *pass, *acc_pass;
+       gboolean failed = FALSE;
 
        g_return_if_fail(account->userid != NULL);
-
-       pass = account->passwd;
-       if (!pass) {
+       acc_pass = account->passwd;
+try_again:
+       pass = acc_pass;
+       if (!pass && account->imap_auth_type != IMAP_AUTH_ANON) {
                gchar *tmp_pass;
                tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
                if (!tmp_pass)
-                       tmp_pass = g_strdup(""); /* allow empty password */
+                       return;
                Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
                g_free(tmp_pass);
+       } else if (account->imap_auth_type == IMAP_AUTH_ANON) {
+               pass = "";
        }
        statusbar_print_all(_("Connecting to IMAP4 server %s...\n"),
                                account->recv_server);
        if (imap_auth(session, account->userid, pass, account->imap_auth_type) != IMAP_SUCCESS) {
-               imap_threaded_disconnect(session->folder);
-               imap_cmd_logout(session);
                statusbar_pop_all();
                
+               if (!failed) {
+                       acc_pass = NULL;
+                       failed = TRUE;
+                       goto try_again;
+               } else {
+                       imap_threaded_disconnect(session->folder);
+                       imap_cmd_logout(session);
+                       alertpanel_error(_("Couldn't login to IMAP server %s."), account->recv_server);
+               }               
+
                return;
-       }
+       } 
+
        statusbar_pop_all();
        session->authenticated = TRUE;
 }
@@ -922,7 +958,7 @@ static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
                make_dir_hier(path);
        filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
        g_free(path);
-
+       debug_print("trying to fetch cached %s\n", filename);
        if (is_file_exist(filename)) {
                /* see whether the local file represents the whole message
                 * or not. As the IMAP server reports size with \r chars,
@@ -933,14 +969,19 @@ static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
 
                if (cached)
                        debug_print("message %d has been already %scached (%d/%d).\n", uid,
-                               have_size == cached->size ? "fully ":"",
+                               have_size >= cached->size ? "fully ":"",
                                have_size, (int)cached->size);
                
-               if (cached && (cached->size == have_size || !body)) {
+               if (cached && (cached->size <= have_size || !body)) {
                        procmsg_msginfo_free(cached);
                        procmsg_msginfo_free(msginfo);
                        file_strip_crs(filename);
                        return filename;
+               } else if (!cached) {
+                       debug_print("message not cached, considering file complete\n");
+                       procmsg_msginfo_free(msginfo);
+                       file_strip_crs(filename);
+                       return filename;
                } else {
                        procmsg_msginfo_free(cached);
                        procmsg_msginfo_free(msginfo);
@@ -948,17 +989,21 @@ static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
        }
 
        session = imap_session_get(folder);
+       
        if (!session) {
                g_free(filename);
                return NULL;
        }
 
+       lock_session();
+
        debug_print("IMAP fetching messages\n");
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
                         NULL, NULL, NULL, NULL, FALSE);
        if (ok != IMAP_SUCCESS) {
                g_warning("can't select mailbox %s\n", item->path);
                g_free(filename);
+               unlock_session();
                return NULL;
        }
 
@@ -968,9 +1013,11 @@ static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
        if (ok != IMAP_SUCCESS) {
                g_warning("can't fetch message %d\n", uid);
                g_free(filename);
+               unlock_session();
                return NULL;
        }
 
+       unlock_session();
        file_strip_crs(filename);
        return filename;
 }
@@ -1014,6 +1061,7 @@ static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
        if (!session) {
                return -1;
        }
+       lock_session();
        destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 
        statusbar_print_all(_("Adding messages..."));
@@ -1022,7 +1070,6 @@ static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
                IMAPFlags iflags = 0;
                guint32 new_uid = 0;
                gchar *real_file = NULL;
-               gboolean file_is_tmp = FALSE;
                fileinfo = (MsgFileInfo *)cur->data;
 
                statusbar_progress_all(curnum, total, 1);
@@ -1037,22 +1084,6 @@ static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
                                iflags |= IMAP_FLAG_SEEN;
                }
                
-               if (fileinfo->flags) {
-                       if ((MSG_IS_QUEUED(*fileinfo->flags) 
-                            || MSG_IS_DRAFT(*fileinfo->flags))
-                       && !folder_has_parent_of_type(dest, F_QUEUE)
-                       && !folder_has_parent_of_type(dest, F_DRAFT)) {
-                               real_file = get_tmp_file();
-                               file_is_tmp = TRUE;
-                               if (procmsg_remove_special_headers(
-                                               fileinfo->file, 
-                                               real_file) !=0) {
-                                       g_free(real_file);
-                                       g_free(destdir);
-                                       return -1;
-                               }
-                       } 
-               }
                if (real_file == NULL)
                        real_file = g_strdup(fileinfo->file);
                
@@ -1067,25 +1098,51 @@ static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
 
                if (ok != IMAP_SUCCESS) {
                        g_warning("can't append message %s\n", real_file);
-                       if (file_is_tmp)
-                               g_unlink(real_file);
                        g_free(real_file);
                        g_free(destdir);
+                       unlock_session();
+                       statusbar_progress_all(0,0,0);
+                       statusbar_pop_all();
                        return -1;
+               } else {
+                       debug_print("appended new message as %d\n", new_uid);
+                       /* put the local file in the imapcache, so that we don't
+                        * have to fetch it back later. */
+                       if (new_uid > 0) {
+                               gchar *cache_path = folder_item_get_path(dest);
+                               if (!is_dir_exist(cache_path))
+                                       make_dir_hier(cache_path);
+                               if (is_dir_exist(cache_path)) {
+                                       gchar *cache_file = g_strconcat(
+                                               cache_path, G_DIR_SEPARATOR_S, 
+                                               itos(new_uid), NULL);
+                                       copy_file(real_file, cache_file, TRUE);
+                                       debug_print("copied to cache: %s\n", cache_file);
+                                       g_free(cache_file);
+                               }
+                               g_free(cache_path);
+                       }
                }
 
                if (relation != NULL)
                        g_relation_insert(relation, fileinfo->msginfo != NULL ? 
                                          (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
                                          GINT_TO_POINTER(dest->last_num + 1));
-               if (last_uid < new_uid)
+               if (new_uid == 0) {
+                       new_uid = dest->last_num+1;
+               }
+               if (last_uid < new_uid) {
                        last_uid = new_uid;
-               if (file_is_tmp)
-                       g_unlink(real_file);
+               }
+
+               g_free(real_file);
        }
        statusbar_progress_all(0,0,0);
        statusbar_pop_all();
-
+       
+       imap_cmd_expunge(session);
+       unlock_session();
+       
        g_free(destdir);
 
        return last_uid;
@@ -1112,17 +1169,41 @@ static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
        if (!session) {
                return -1;
        }
+       lock_session();
        msginfo = (MsgInfo *)msglist->data;
 
        src = msginfo->folder;
        if (src == dest) {
                g_warning("the src folder is identical to the dest.\n");
+               unlock_session();
                return -1;
        }
 
+       if (src->folder != dest->folder) {
+               GSList *infolist = NULL, *cur;
+               int res = -1;
+               for (cur = msglist; cur; cur = cur->next) {
+                       msginfo = (MsgInfo *)cur->data;
+                       MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
+                       fileinfo->file = procmsg_get_message_file(msginfo);
+                       fileinfo->flags = &(msginfo->flags);
+                       infolist = g_slist_prepend(infolist, fileinfo);
+               }
+               infolist = g_slist_reverse(infolist);
+               res = folder_item_add_msgs(dest, infolist, FALSE);
+               for (cur = infolist; cur; cur = cur->next) {
+                       MsgFileInfo *info = (MsgFileInfo *)cur->data;
+                       g_free(info->file);
+                       g_free(info);
+               }
+               g_slist_free(infolist);
+               return res;
+       } 
+
        ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
                         NULL, NULL, NULL, NULL, FALSE);
        if (ok != IMAP_SUCCESS) {
+               unlock_session();
                return ok;
        }
 
@@ -1143,6 +1224,7 @@ static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
                if (ok != IMAP_SUCCESS) {
                        g_relation_destroy(uid_mapping);
                        imap_lep_set_free(seq_list);
+                       unlock_session();
                        return -1;
                }
        }
@@ -1177,6 +1259,7 @@ static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
        g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
        IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
 
+       unlock_session();
        if (ok == IMAP_SUCCESS)
                return last_num;
        else
@@ -1199,7 +1282,6 @@ static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
                    MsgInfoList *msglist, GRelation *relation)
 {
        MsgInfo *msginfo;
-       GSList *file_list;
        gint ret;
 
        g_return_val_if_fail(folder != NULL, -1);
@@ -1209,20 +1291,7 @@ static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
        msginfo = (MsgInfo *)msglist->data;
        g_return_val_if_fail(msginfo->folder != NULL, -1);
 
-       if (folder == msginfo->folder->folder &&
-           !folder_has_parent_of_type(msginfo->folder, F_DRAFT) &&
-           !folder_has_parent_of_type(msginfo->folder, F_QUEUE)) {
-               ret = imap_do_copy_msgs(folder, dest, msglist, relation);
-               return ret;
-       }
-
-       file_list = procmsg_get_message_file_list(msglist);
-       g_return_val_if_fail(file_list != NULL, -1);
-
-       ret = imap_add_msgs(folder, dest, file_list, relation);
-
-       procmsg_message_file_list_free(file_list);
-
+       ret = imap_do_copy_msgs(folder, dest, msglist, relation);
        return ret;
 }
 
@@ -1230,7 +1299,7 @@ static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest, 
                                MsgInfoList *msglist, GRelation *relation)
 {
-       gchar *destdir;
+       gchar *destdir, *dir;
        GSList *numlist = NULL, *cur;
        MsgInfo *msginfo;
        IMAPSession *session;
@@ -1245,11 +1314,13 @@ static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
        if (!session) {
                return -1;
        }
+       lock_session();
        msginfo = (MsgInfo *)msglist->data;
 
        ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
                         NULL, NULL, NULL, NULL, FALSE);
        if (ok != IMAP_SUCCESS) {
+               unlock_session();
                return ok;
        }
 
@@ -1257,8 +1328,9 @@ static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
        for (cur = msglist; cur; cur = cur->next) {
                msginfo = (MsgInfo *)cur->data;
                if (!MSG_IS_DELETED(msginfo->flags))
-                       numlist = g_slist_append(numlist, GINT_TO_POINTER(msginfo->msgnum));
+                       numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
        }
+       numlist = g_slist_reverse(numlist);
 
        uid_mapping = g_relation_new(2);
        g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
@@ -1268,19 +1340,30 @@ static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
                numlist, IMAP_FLAG_DELETED, TRUE);
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't set deleted flags\n"));
+               unlock_session();
                return ok;
        }
        ok = imap_cmd_expunge(session);
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't expunge\n"));
+               unlock_session();
                return ok;
        }
        
+       dir = folder_item_get_path(msginfo->folder);
+       if (is_dir_exist(dir)) {
+               for (cur = msglist; cur; cur = cur->next) {
+                       msginfo = (MsgInfo *)cur->data;
+                       remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
+               }
+       }
+       g_free(dir);
+
        g_relation_destroy(uid_mapping);
        g_slist_free(numlist);
 
        g_free(destdir);
-
+       unlock_session();
        if (ok == IMAP_SUCCESS)
                return 0;
        else
@@ -1343,12 +1426,13 @@ static gint imap_scan_tree(Folder *folder)
                return -1;
        }
 
+       lock_session();
        if (folder->account->imap_dir && *folder->account->imap_dir) {
                gchar *real_path;
                int r;
                clist * lep_list;
 
-               Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
+               Xstrdup_a(root_folder, folder->account->imap_dir, {unlock_session();return -1;});
                extract_quote(root_folder, '"');
                subst_char(root_folder,
                           imap_get_path_separator(IMAP_FOLDER(folder),
@@ -1369,9 +1453,9 @@ static gint imap_scan_tree(Folder *folder)
                                item->folder = folder;
                                folder->node = item->node = g_node_new(item);
                        }
+                       unlock_session();
                        return -1;
                }
-               
                mailimap_list_result_free(lep_list);
                
                g_free(real_path);
@@ -1389,6 +1473,7 @@ static gint imap_scan_tree(Folder *folder)
 
        imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data));
        imap_create_missing_folders(folder);
+       unlock_session();
 
        return 0;
 }
@@ -1439,7 +1524,7 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
        }
        else {
                item_list = imap_list_from_lep(imapfolder,
-                                              lep_list, real_path);
+                                              lep_list, real_path, FALSE);
                mailimap_list_result_free(lep_list);
        }
        
@@ -1479,6 +1564,7 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
        for (cur = item_list; cur != NULL; cur = cur->next) {
                FolderItem *cur_item = FOLDER_ITEM(cur->data);
                new_item = NULL;
+
                for (node = item->node->children; node != NULL;
                     node = node->next) {
                        if (!strcmp2(FOLDER_ITEM(node->data)->path,
@@ -1649,7 +1735,8 @@ static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
        gchar *new_name;
        const gchar *p;
        gint ok;
-
+       gboolean no_select = FALSE, no_sub = FALSE;
+       
        g_return_val_if_fail(folder != NULL, NULL);
        g_return_val_if_fail(folder->account != NULL, NULL);
        g_return_val_if_fail(parent != NULL, NULL);
@@ -1660,35 +1747,40 @@ static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                return NULL;
        }
 
-       if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0)
+       lock_session();
+       if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
                dirpath = g_strdup(name);
-       else if (parent->path)
+       }else if (parent->path)
                dirpath = g_strconcat(parent->path, "/", name, NULL);
        else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
                dirpath = g_strdup(name);
        else if (folder->account->imap_dir && *folder->account->imap_dir) {
                gchar *imap_dir;
 
-               Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
+               Xstrdup_a(imap_dir, folder->account->imap_dir, {unlock_session();return NULL;});
                strtailchomp(imap_dir, '/');
                dirpath = g_strconcat(imap_dir, "/", name, NULL);
        } else
                dirpath = g_strdup(name);
+               
+       
 
        /* keep trailing directory separator to create a folder that contains
           sub folder */
        imap_path = imap_utf8_to_modified_utf7(dirpath);
+
        strtailchomp(dirpath, '/');
        Xstrdup_a(new_name, name, {
-               g_free(dirpath);                
+               g_free(dirpath); 
+               unlock_session();               
                return NULL;});
 
-       strtailchomp(new_name, '/');
        separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
        imap_path_separator_subst(imap_path, separator);
-       subst_char(new_name, '/', separator);
+       /* remove trailing / for display */
+       strtailchomp(new_name, '/');
 
-       if (strcmp(name, "INBOX") != 0) {
+       if (strcmp(dirpath, "INBOX") != 0) {
                GPtrArray *argbuf;
                gboolean exist = FALSE;
                int r;
@@ -1702,24 +1794,58 @@ static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                        g_free(dirpath);
                        ptr_array_free_strings(argbuf);
                        g_ptr_array_free(argbuf, TRUE);
+                       unlock_session();
                        return NULL;
                }
                
                if (clist_count(lep_list) > 0)
                        exist = TRUE;
-               
+               mailimap_list_result_free(lep_list);
+               lep_list = NULL;
                if (!exist) {
                        ok = imap_cmd_create(session, imap_path);
                        if (ok != IMAP_SUCCESS) {
                                log_warning(_("can't create mailbox\n"));
                                g_free(imap_path);
                                g_free(dirpath);
+                               unlock_session();
                                return NULL;
                        }
+                       r = imap_threaded_list(folder, "", imap_path, &lep_list);
+                       if (r == MAILIMAP_NO_ERROR) {
+                               GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
+                                              lep_list, dirpath, TRUE);
+                               if (item_list) {
+                                       FolderItem *cur_item = FOLDER_ITEM(item_list->data);
+                                       no_select = cur_item->no_select;
+                                       no_sub = cur_item->no_sub;
+                                       g_slist_free(item_list);
+                               } 
+                               mailimap_list_result_free(lep_list);
+                       }
+
+               }
+       } else {
+               clist *lep_list;
+               int r;
+               /* just get flags */
+               r = imap_threaded_list(folder, "", "INBOX", &lep_list);
+               if (r == MAILIMAP_NO_ERROR) {
+                       GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
+                                      lep_list, dirpath, TRUE);
+                       if (item_list) {
+                               FolderItem *cur_item = FOLDER_ITEM(item_list->data);
+                               no_select = cur_item->no_select;
+                               no_sub = cur_item->no_sub;
+                               g_slist_free(item_list);
+                       } 
+                       mailimap_list_result_free(lep_list);
                }
        }
 
        new_item = folder_item_new(folder, new_name, dirpath);
+       new_item->no_select = no_select;
+       new_item->no_sub = no_sub;
        folder_item_append(parent, new_item);
        g_free(imap_path);
        g_free(dirpath);
@@ -1728,7 +1854,7 @@ static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
        if (!is_dir_exist(dirpath))
                make_dir_hier(dirpath);
        g_free(dirpath);
-
+       unlock_session();
        return new_item;
 }
 
@@ -1753,16 +1879,19 @@ static gint imap_rename_folder(Folder *folder, FolderItem *item,
        g_return_val_if_fail(item->path != NULL, -1);
        g_return_val_if_fail(name != NULL, -1);
 
+       session = imap_session_get(folder);
+       if (!session) {
+               return -1;
+       }
+       lock_session();
+
        if (strchr(name, imap_get_path_separator(IMAP_FOLDER(folder), item->path)) != NULL) {
                g_warning(_("New folder name must not contain the namespace "
                            "path separator"));
+               unlock_session();
                return -1;
        }
 
-       session = imap_session_get(folder);
-       if (!session) {
-               return -1;
-       }
        real_oldpath = imap_get_real_path(IMAP_FOLDER(folder), item->path);
 
        g_free(session->mbox);
@@ -1771,6 +1900,7 @@ static gint imap_rename_folder(Folder *folder, FolderItem *item,
                              &exists, &recent, &unseen, &uid_validity, FALSE);
        if (ok != IMAP_SUCCESS) {
                g_free(real_oldpath);
+               unlock_session();
                return -1;
        }
 
@@ -1792,6 +1922,7 @@ static gint imap_rename_folder(Folder *folder, FolderItem *item,
                g_free(real_oldpath);
                g_free(newpath);
                g_free(real_newpath);
+               unlock_session();
                return -1;
        }
 
@@ -1818,7 +1949,7 @@ static gint imap_rename_folder(Folder *folder, FolderItem *item,
        g_free(newpath);
        g_free(real_oldpath);
        g_free(real_newpath);
-
+       unlock_session();
        return 0;
 }
 
@@ -1828,8 +1959,6 @@ static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
        IMAPSession *session;
        gchar *path;
        gchar *cache_dir;
-       gint exists, recent, unseen;
-       guint32 uid_validity;
 
        g_return_val_if_fail(folder != NULL, -1);
        g_return_val_if_fail(item != NULL, -1);
@@ -1839,19 +1968,22 @@ static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
        if (!session) {
                return -1;
        }
+       lock_session();
        path = imap_get_real_path(IMAP_FOLDER(folder), item->path);
 
-       ok = imap_cmd_examine(session, "INBOX",
-                             &exists, &recent, &unseen, &uid_validity, FALSE);
+       ok = imap_cmd_delete(session, path);
        if (ok != IMAP_SUCCESS) {
+               gchar *tmp = g_strdup_printf("%s%c", path, 
+                               imap_get_path_separator(IMAP_FOLDER(folder), path));
                g_free(path);
-               return -1;
+               path = tmp;
+               ok = imap_cmd_delete(session, path);
        }
 
-       ok = imap_cmd_delete(session, path);
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't delete mailbox\n"));
                g_free(path);
+               unlock_session();
                return -1;
        }
 
@@ -1861,7 +1993,7 @@ static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
                g_warning("can't remove directory '%s'\n", cache_dir);
        g_free(cache_dir);
        folder_item_remove(item);
-
+       unlock_session();
        return 0;
 }
 
@@ -1931,6 +2063,8 @@ static void *imap_get_uncached_messages_thread(void *data)
                if (r != MAILIMAP_NO_ERROR)
                        continue;
                
+               session_set_access_time(SESSION(session));
+
                count = 0;
                for(i = 0 ; i < carray_count(env_list) ; i ++) {
                        struct imap_fetch_env_info * info;
@@ -1938,6 +2072,8 @@ static void *imap_get_uncached_messages_thread(void *data)
                        
                        info = carray_get(env_list, i);
                        msginfo = imap_envelope_from_lep(info, item);
+                       if (msginfo == NULL)
+                               continue;
                        msginfo->folder = item;
                        if (!newlist)
                                llast = newlist = g_slist_append(newlist, msginfo);
@@ -1951,6 +2087,13 @@ static void *imap_get_uncached_messages_thread(void *data)
                imap_fetch_env_free(env_list);
        }
        
+       for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
+               struct mailimap_set * imapset;
+               
+               imapset = cur->data;
+               mailimap_set_free(imapset);
+       }
+       
        session_set_access_time(SESSION(session));
        stuff->done = TRUE;
        return newlist;
@@ -2005,7 +2148,10 @@ static GSList *imap_get_uncached_messages(IMAPSession *session,
                data->numlist = newlist;
                data->cur += count;
                
-               if (prefs_common.work_offline && !inc_offline_should_override()) {
+               if (prefs_common.work_offline && 
+                   !inc_offline_should_override(
+                       _("Sylpheed-Claws needs network access in order "
+                         "to access the IMAP server."))) {
                        g_free(data);
                        return NULL;
                }
@@ -2086,11 +2232,31 @@ static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
        return NULL;
 }
 
+gchar imap_get_path_separator_for_item(FolderItem *item)
+{
+       Folder *folder = NULL;
+       IMAPFolder *imap_folder = NULL;
+       if (!item)
+               return '/';
+       folder = item->folder;
+       
+       if (!folder)
+               return '/';
+       
+       imap_folder = IMAP_FOLDER(folder);
+       
+       if (!imap_folder)
+               return '/';
+       
+       return imap_get_path_separator(imap_folder, item->path);
+}
 
 static gchar imap_get_path_separator(IMAPFolder *folder, const gchar *path)
 {
        IMAPNameSpace *namespace;
        gchar separator = '/';
+       IMAPSession *session = imap_session_get(FOLDER(folder));
+       g_return_val_if_fail(session != NULL, '/');
 
        if (folder->last_seen_separator == 0) {
                clist * lep_list;
@@ -2183,14 +2349,18 @@ static gint imap_select(IMAPSession *session, IMAPFolder *folder,
        gint exists_, recent_, unseen_;
        guint32 uid_validity_;
        
-       if (!exists || !recent || !unseen || !uid_validity) {
+       if (!exists && !recent && !unseen && !uid_validity) {
                if (session->mbox && strcmp(session->mbox, path) == 0)
                        return IMAP_SUCCESS;
+       }
+       if (!exists)
                exists = &exists_;
+       if (!recent)
                recent = &recent_;
+       if (!unseen)
                unseen = &unseen_;
+       if (!uid_validity)
                uid_validity = &uid_validity_;
-       }
 
        g_free(session->mbox);
        session->mbox = NULL;
@@ -2225,45 +2395,6 @@ static gint imap_status(IMAPSession *session, IMAPFolder *folder,
        
        real_path = imap_get_real_path(folder, path);
 
-#if 0
-       if (time(NULL) - item->last_update >= 5 && item->last_update != 1) {
-               /* do the full stuff */
-               item->last_update = 1; /* force update */
-               debug_print("updating everything\n");
-               r = imap_status(session, folder, path, item,
-               &item->c_messages, &item->c_uid_next,
-               &item->c_uid_validity, &item->c_unseen, block);
-               if (r != MAILIMAP_NO_ERROR) {
-                       debug_print("status err %d\n", r);
-                       return IMAP_ERROR;
-               }
-               item->last_update = time(NULL);
-               if (messages) 
-                       *messages = item->c_messages;
-               if (uid_next)
-                       *uid_next = item->c_uid_next;
-               if (uid_validity)
-                       *uid_validity = item->c_uid_validity;
-               if (unseen)
-                       *unseen = item->c_unseen;
-               return 0;
-       } else if (time(NULL) - item->last_update < 5) {
-               /* return cached stuff */
-               debug_print("using cache\n");
-               if (messages) 
-                       *messages = item->c_messages;
-               if (uid_next)
-                       *uid_next = item->c_uid_next;
-               if (uid_validity)
-                       *uid_validity = item->c_uid_validity;
-               if (unseen)
-                       *unseen = item->c_unseen;
-               return 0;
-       }
-#endif
-
-       /* if we get there, we're updating cache */
-
        if (messages) {
                mask |= 1 << 0;
        }
@@ -2337,50 +2468,6 @@ static void imap_free_capabilities(IMAPSession *session)
 
 /* low-level IMAP4rev1 commands */
 
-#if 0
-static gint imap_cmd_authenticate(IMAPSession *session, const gchar *user,
-                                 const gchar *pass, IMAPAuthType type)
-{
-       gchar *auth_type;
-       gint ok;
-       gchar *buf = NULL;
-       gchar *challenge;
-       gint challenge_len;
-       gchar hexdigest[33];
-       gchar *response;
-       gchar *response64;
-
-       auth_type = "CRAM-MD5";
-
-       imap_gen_send(session, "AUTHENTICATE %s", auth_type);
-       ok = imap_gen_recv(session, &buf);
-       if (ok != IMAP_SUCCESS || buf[0] != '+' || buf[1] != ' ') {
-               g_free(buf);
-               return IMAP_ERROR;
-       }
-
-       challenge = g_malloc(strlen(buf + 2) + 1);
-       challenge_len = base64_decode(challenge, buf + 2, -1);
-       challenge[challenge_len] = '\0';
-       g_free(buf);
-
-       md5_hex_hmac(hexdigest, challenge, challenge_len, pass, strlen(pass));
-       g_free(challenge);
-
-       response = g_strdup_printf("%s %s", user, hexdigest);
-       response64 = g_malloc((strlen(response) + 3) * 2 + 1);
-       base64_encode(response64, response, strlen(response));
-       g_free(response);
-
-       sock_puts(SESSION(session)->sock, response64);
-       ok = imap_cmd_ok(session, NULL);
-       if (ok != IMAP_SUCCESS)
-               log_warning(_("IMAP4 authentication failed.\n"));
-
-       return ok;
-}
-#endif
-
 static gint imap_cmd_login(IMAPSession *session,
                           const gchar *user, const gchar *pass,
                           const gchar *type)
@@ -2394,10 +2481,12 @@ static gint imap_cmd_login(IMAPSession *session,
                        type);
        r = imap_threaded_login(session->folder, user, pass, type);
        if (r != MAILIMAP_NO_ERROR) {
-               log_error("IMAP4< Error logging in to %s\n",
+               log_print("IMAP4< Error logging in to %s\n",
                                SESSION(session)->server);
                ok = IMAP_ERROR;
        } else {
+               log_print("IMAP4< Login to %s successful\n",
+                               SESSION(session)->server);
                ok = IMAP_SUCCESS;
        }
        return ok;
@@ -2431,7 +2520,8 @@ static gint imap_cmd_starttls(IMAPSession *session)
 {
        int r;
        
-       r = imap_threaded_starttls(session->folder);
+       r = imap_threaded_starttls(session->folder, 
+               SESSION(session)->server, SESSION(session)->port);
        if (r != MAILIMAP_NO_ERROR) {
                debug_print("starttls err %d\n", r);
                return IMAP_ERROR;
@@ -2558,7 +2648,10 @@ static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
        data->headers = headers;
        data->body = body;
 
-       if (prefs_common.work_offline && !inc_offline_should_override()) {
+       if (prefs_common.work_offline && 
+           !inc_offline_should_override(
+               _("Sylpheed-Claws needs network access in order "
+                 "to access the IMAP server."))) {
                g_free(data);
                return -1;
        }
@@ -2581,9 +2674,8 @@ static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
 
        flag_list = imap_flag_to_lep(flags);
        r = imap_threaded_append(session->folder, destfolder,
-                        file, flag_list);
-       if (new_uid != NULL)
-               *new_uid = 0;
+                        file, flag_list, (int *)new_uid);
+       mailimap_flag_list_free(flag_list);
 
        if (r != MAILIMAP_NO_ERROR) {
                debug_print("append err %d\n", r);
@@ -2627,6 +2719,7 @@ static gint imap_cmd_store(IMAPSession *session, struct mailimap_set * set,
                        mailimap_store_att_flags_new_remove_flags_silent(flag_list);
        
        r = imap_threaded_store(session->folder, set, store_att_flags);
+       mailimap_store_att_flags_free(store_att_flags);
        if (r != MAILIMAP_NO_ERROR) {
                
                return IMAP_ERROR;
@@ -2639,7 +2732,10 @@ static gint imap_cmd_expunge(IMAPSession *session)
 {
        int r;
        
-       if (prefs_common.work_offline && !inc_offline_should_override()) {
+       if (prefs_common.work_offline && 
+           !inc_offline_should_override(
+               _("Sylpheed-Claws needs network access in order "
+                 "to access the IMAP server."))) {
                return -1;
        }
 
@@ -2879,6 +2975,7 @@ static gboolean imap_rename_folder_func(GNode *node, gpointer data)
 
 typedef struct _get_list_uid_data {
        Folder *folder;
+       IMAPSession *session;
        IMAPFolderItem *item;
        GSList **msgnum_list;
        gboolean done;
@@ -2897,12 +2994,12 @@ static void *get_list_of_uids_thread(void *data)
        clist * lep_uidlist;
        int r;
 
-       session = imap_session_get(folder);
+       session = stuff->session;
        if (session == NULL) {
                stuff->done = TRUE;
                return GINT_TO_POINTER(-1);
        }
-
+       /* no session locking here, it's already locked by caller */
        ok = imap_select(session, IMAP_FOLDER(folder), item->item.path,
                         NULL, NULL, NULL, NULL, TRUE);
        if (ok != IMAP_SUCCESS) {
@@ -2916,11 +3013,15 @@ static void *get_list_of_uids_thread(void *data)
 
        r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE, set,
                                 &lep_uidlist);
+       mailimap_set_free(set);
+       
        if (r == MAILIMAP_NO_ERROR) {
                GSList * fetchuid_list;
                
                fetchuid_list =
                        imap_uid_list_from_lep(lep_uidlist);
+               mailimap_search_result_free(lep_uidlist);
+               
                uidlist = g_slist_concat(fetchuid_list, uidlist);
        }
        else {
@@ -2932,6 +3033,7 @@ static void *get_list_of_uids_thread(void *data)
                if (r == MAILIMAP_NO_ERROR) {
                        fetchuid_list =
                                imap_uid_list_from_lep_tab(lep_uidtab);
+                       imap_fetch_uid_list_free(lep_uidtab);
                        uidlist = g_slist_concat(fetchuid_list, uidlist);
                }
        }
@@ -2955,12 +3057,11 @@ static void *get_list_of_uids_thread(void *data)
                }
        }
        g_slist_free(uidlist);
-
        stuff->done = TRUE;
        return GINT_TO_POINTER(nummsgs);
 }
 
-static gint get_list_of_uids(Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
+static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
 {
        gint result;
        get_list_uid_data *data = g_new0(get_list_uid_data, 1);
@@ -2968,8 +3069,11 @@ static gint get_list_of_uids(Folder *folder, IMAPFolderItem *item, GSList **msgn
        data->folder = folder;
        data->item = item;
        data->msgnum_list = msgnum_list;
-
-       if (prefs_common.work_offline && !inc_offline_should_override()) {
+       data->session = session;
+       if (prefs_common.work_offline && 
+           !inc_offline_should_override(
+               _("Sylpheed-Claws needs network access in order "
+                 "to access the IMAP server."))) {
                g_free(data);
                return -1;
        }
@@ -2984,7 +3088,8 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
 {
        IMAPFolderItem *item = (IMAPFolderItem *)_item;
        IMAPSession *session;
-       gint ok, nummsgs = 0, exists, uid_val, uid_next;
+       gint ok, nummsgs = 0, exists;
+       guint32 uid_next = 0, uid_val = 0;
        GSList *uidlist = NULL;
        gchar *dir;
        gboolean selected_folder;
@@ -2999,24 +3104,34 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
 
        session = imap_session_get(folder);
        g_return_val_if_fail(session != NULL, -1);
+       lock_session();
 
-       statusbar_print_all("Scanning %s...\n", FOLDER_ITEM(item)->path 
-                               ? FOLDER_ITEM(item)->path:"");
+       if (FOLDER_ITEM(item)->path) 
+               statusbar_print_all(_("Scanning folder %s%c%s ..."),
+                                     FOLDER_ITEM(item)->folder->name, 
+                                     G_DIR_SEPARATOR,
+                                     FOLDER_ITEM(item)->path);
+       else
+               statusbar_print_all(_("Scanning folder %s ..."),
+                                     FOLDER_ITEM(item)->folder->name);
 
        selected_folder = (session->mbox != NULL) &&
                          (!strcmp(session->mbox, item->item.path));
-       if (selected_folder) {
+       if (selected_folder && time(NULL) - item->use_cache < 2) {
                ok = imap_cmd_noop(session);
                if (ok != IMAP_SUCCESS) {
                        debug_print("disconnected!\n");
                        session = imap_reconnect_if_possible(folder, session);
                        if (session == NULL) {
                                statusbar_pop_all();
+                               unlock_session();
                                return -1;
                        }
                }
                exists = session->exists;
 
+               uid_next = item->c_uid_next;
+               uid_val = item->c_uid_validity;
                *old_uids_valid = TRUE;
        } else {
                if (item->use_cache && time(NULL) - item->use_cache < 2) {
@@ -3029,9 +3144,12 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
                        ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, item,
                                 &exists, &uid_next, &uid_val, NULL, FALSE);
                }
+               item->item.last_num = uid_next - 1;
+               
                item->use_cache = (time_t)0;
                if (ok != IMAP_SUCCESS) {
                        statusbar_pop_all();
+                       unlock_session();
                        return -1;
                }
                if(item->item.mtime == uid_val)
@@ -3039,7 +3157,8 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
                else {
                        *old_uids_valid = FALSE;
 
-                       debug_print("Freeing imap uid cache\n");
+                       debug_print("Freeing imap uid cache (%d != %d)\n",
+                                       (int)item->item.mtime, uid_val);
                        item->lastuid = 0;
                        g_slist_free(item->uid_list);
                        item->uid_list = NULL;
@@ -3050,13 +3169,11 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
                }
        }
 
-       if (!selected_folder)
-               item->uid_next = uid_next;
-
        /* If old uid_next matches new uid_next we can be sure no message
           was added to the folder */
-       if (( selected_folder && !session->folder_content_changed) ||
-           (!selected_folder && uid_next == item->uid_next)) {
+       debug_print("uid_next is %d and item->uid_next %d \n", 
+               uid_next, item->uid_next);
+       if (uid_next == item->uid_next) {
                nummsgs = g_slist_length(item->uid_list);
 
                /* If number of messages is still the same we
@@ -3065,8 +3182,10 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
                   we discard our cache to start a new scan to find
                   out which numbers have been removed */
                if (exists == nummsgs) {
+                       debug_print("exists == nummsgs\n");
                        *msgnum_list = g_slist_copy(item->uid_list);
                        statusbar_pop_all();
+                       unlock_session();
                        return nummsgs;
                } else if (exists < nummsgs) {
                        debug_print("Freeing imap uid cache");
@@ -3079,13 +3198,15 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
        if (exists == 0) {
                *msgnum_list = NULL;
                statusbar_pop_all();
+               unlock_session();
                return 0;
        }
 
-       nummsgs = get_list_of_uids(folder, item, &uidlist);
+       nummsgs = get_list_of_uids(session, folder, item, &uidlist);
 
        if (nummsgs < 0) {
                statusbar_pop_all();
+               unlock_session();
                return -1;
        }
 
@@ -3101,7 +3222,7 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
 
                g_slist_free(*msgnum_list);
 
-               nummsgs = get_list_of_uids(folder, item, &uidlist);
+               nummsgs = get_list_of_uids(session, folder, item, &uidlist);
        }
 
        *msgnum_list = uidlist;
@@ -3111,8 +3232,11 @@ gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list,
        remove_numbered_files_not_in_list(dir, *msgnum_list);
        g_free(dir);
        
+       item->uid_next = uid_next;
+       
        debug_print("get_num_list - ok - %i\n", nummsgs);
        statusbar_pop_all();
+       unlock_session();
        return nummsgs;
 }
 
@@ -3157,26 +3281,28 @@ GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
 
        session = imap_session_get(folder);
        g_return_val_if_fail(session != NULL, NULL);
-
+       lock_session();
        debug_print("IMAP getting msginfos\n");
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
                         NULL, NULL, NULL, NULL, FALSE);
-       if (ok != IMAP_SUCCESS)
+       if (ok != IMAP_SUCCESS) {
+               unlock_session();
                return NULL;
-
+       }
        if (!(folder_has_parent_of_type(item, F_DRAFT) || 
              folder_has_parent_of_type(item, F_QUEUE))) {
                ret = g_slist_concat(ret,
                        imap_get_uncached_messages(session, item,
                                                   msgnum_list));
        } else {
-               MsgNumberList *sorted_list, *elem;
+               MsgNumberList *sorted_list, *elem, *llast = NULL;
                gint startnum, lastnum;
 
                sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
 
                startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
 
+               llast = g_slist_last(ret);
                for (elem = sorted_list;; elem = g_slist_next(elem)) {
                        guint num = 0;
 
@@ -3193,10 +3319,16 @@ GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
                                                MsgInfo *msginfo = imap_parse_msg(file, item);
                                                if (msginfo != NULL) {
                                                        msginfo->msgnum = i;
-                                                       ret = g_slist_append(ret, msginfo);
+                                                       if (llast == NULL)
+                                                               llast = ret = g_slist_append(ret, msginfo);
+                                                       else {
+                                                               llast = g_slist_append(llast, msginfo);
+                                                               llast = llast->next;
+                                                       }
                                                }
                                                g_free(file);
                                        }
+                                       session_set_access_time(SESSION(session));
                                }
 
                                if (elem == NULL)
@@ -3209,7 +3341,7 @@ GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
 
                g_slist_free(sorted_list);
        }
-
+       unlock_session();
        return ret;
 }
 
@@ -3249,37 +3381,47 @@ gboolean imap_scan_required(Folder *folder, FolderItem *_item)
 
        session = imap_session_get(folder);
        g_return_val_if_fail(session != NULL, FALSE);
-
+       lock_session();
        selected_folder = (session->mbox != NULL) &&
                          (!strcmp(session->mbox, item->item.path));
-       if (selected_folder) {
+       if (selected_folder && time(NULL) - item->use_cache < 2) {
                ok = imap_cmd_noop(session);
                if (ok != IMAP_SUCCESS) {
                        debug_print("disconnected!\n");
                        session = imap_reconnect_if_possible(folder, session);
                        if (session == NULL)
                                return FALSE;
+                       lock_session();
                }
 
                if (session->folder_content_changed
-               ||  session->exists != item->item.total_msgs)
+               ||  session->exists != item->item.total_msgs) {
+                       unlock_session();
                        return TRUE;
+               }
        } else {
                ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
                                 &exists, &uid_next, &uid_val, &unseen, FALSE);
-               if (ok != IMAP_SUCCESS)
+               if (ok != IMAP_SUCCESS) {
+                       unlock_session();
                        return FALSE;
+               }
 
                item->use_cache = time(NULL);
                item->c_messages = exists;
                item->c_uid_next = uid_next;
                item->c_uid_validity = uid_val;
                item->c_unseen = unseen;
-
-               if ((uid_next != item->uid_next) || (exists != item->item.total_msgs))
+               item->item.last_num = uid_next - 1;
+               debug_print("uidnext %d, item->uid_next %d, exists %d, item->item.total_msgs %d\n", 
+                       uid_next, item->uid_next, exists, item->item.total_msgs);
+               if ((uid_next != item->uid_next) || (exists != item->item.total_msgs)
+                   || unseen != item->item.unread_msgs || uid_val != item->item.mtime) {
+                       unlock_session();
                        return TRUE;
+               }
        }
-
+       unlock_session();
        return FALSE;
 }
 
@@ -3302,10 +3444,6 @@ void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPe
        if (!session) {
                return;
        }
-       if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
-           NULL, NULL, NULL, NULL, FALSE)) != IMAP_SUCCESS) {
-               return;
-       }
 
        if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
                flags_set |= IMAP_FLAG_FLAGGED;
@@ -3327,6 +3465,19 @@ void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPe
        if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
                flags_unset |= IMAP_FLAG_DELETED;
 
+       if (!flags_set && !flags_unset) {
+               /* the changed flags were not translatable to IMAP-speak.
+                * like MSG_POSTFILTERED, so just apply. */
+               msginfo->flags.perm_flags = newflags;
+               return;
+       }
+
+       lock_session();
+       if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
+           NULL, NULL, NULL, NULL, FALSE)) != IMAP_SUCCESS) {
+               unlock_session();
+               return;
+       }
        numlist.next = NULL;
        numlist.data = GINT_TO_POINTER(msginfo->msgnum);
 
@@ -3338,30 +3489,38 @@ void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPe
                 */
                debug_print("IMAP batch mode on, deferring flags change\n");
                if (flags_set) {
-                       ht_data = g_hash_table_lookup(flags_set_table, GINT_TO_POINTER(flags_set));
+                       ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table, 
+                               GINT_TO_POINTER(flags_set));
                        if (ht_data == NULL) {
                                ht_data = g_new0(hashtable_data, 1);
                                ht_data->session = session;
-                               g_hash_table_insert(flags_set_table, GINT_TO_POINTER(flags_set), ht_data);
+                               ht_data->item = IMAP_FOLDER_ITEM(item);
+                               g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table, 
+                                       GINT_TO_POINTER(flags_set), ht_data);
                        }
                        if (!g_slist_find(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum)))
                                ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
                } 
                if (flags_unset) {
-                       ht_data = g_hash_table_lookup(flags_unset_table, GINT_TO_POINTER(flags_unset));
+                       ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table, 
+                               GINT_TO_POINTER(flags_unset));
                        if (ht_data == NULL) {
                                ht_data = g_new0(hashtable_data, 1);
                                ht_data->session = session;
-                               g_hash_table_insert(flags_unset_table, GINT_TO_POINTER(flags_unset), ht_data);
+                               ht_data->item = IMAP_FOLDER_ITEM(item);
+                               g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table, 
+                                       GINT_TO_POINTER(flags_unset), ht_data);
                        }
                        if (!g_slist_find(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum)))
-                               ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));         
+                               ht_data->msglist = g_slist_prepend(ht_data->msglist, 
+                                       GINT_TO_POINTER(msginfo->msgnum));              
                }
        } else {
                debug_print("IMAP changing flags\n");
                if (flags_set) {
                        ok = imap_set_message_flags(session, &numlist, flags_set, TRUE);
                        if (ok != IMAP_SUCCESS) {
+                               unlock_session();
                                return;
                        }
                }
@@ -3369,12 +3528,13 @@ void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPe
                if (flags_unset) {
                        ok = imap_set_message_flags(session, &numlist, flags_unset, FALSE);
                        if (ok != IMAP_SUCCESS) {
+                               unlock_session();
                                return;
                        }
                }
        }
        msginfo->flags.perm_flags = newflags;
-       
+       unlock_session();
        return;
 }
 
@@ -3391,12 +3551,13 @@ static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
 
        session = imap_session_get(folder);
        if (!session) return -1;
-
+       lock_session();
        ok = imap_select(session, IMAP_FOLDER(folder), item->path,
                         NULL, NULL, NULL, NULL, FALSE);
-       if (ok != IMAP_SUCCESS)
+       if (ok != IMAP_SUCCESS) {
+               unlock_session();
                return ok;
-
+       }
        numlist.next = NULL;
        numlist.data = GINT_TO_POINTER(uid);
        
@@ -3405,6 +3566,7 @@ static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
                &numlist, IMAP_FLAG_DELETED, TRUE);
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't set deleted flags: %d\n"), uid);
+               unlock_session();
                return ok;
        }
 
@@ -3419,6 +3581,7 @@ static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
        }
        if (ok != IMAP_SUCCESS) {
                log_warning(_("can't expunge\n"));
+               unlock_session();
                return ok;
        }
 
@@ -3428,7 +3591,7 @@ static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
        if (is_dir_exist(dir))
                remove_numbered_files(dir, uid, uid);
        g_free(dir);
-
+       unlock_session();
        return IMAP_SUCCESS;
 }
 
@@ -3498,17 +3661,16 @@ static /*gint*/ void *imap_get_flags_thread(void *data)
                stuff->done = TRUE;
                return GINT_TO_POINTER(-1);
        }
-
+       lock_session();
        selected_folder = (session->mbox != NULL) &&
                          (!strcmp(session->mbox, item->path));
 
        if (!selected_folder) {
-               ok = imap_status(session, IMAP_FOLDER(folder), item->path, IMAP_FOLDER_ITEM(item),
-                        &exists_cnt, NULL, NULL, &unseen_cnt, TRUE);
                ok = imap_select(session, IMAP_FOLDER(folder), item->path,
-                       NULL, NULL, NULL, NULL, TRUE);
+                       &exists_cnt, NULL, &unseen_cnt, NULL, TRUE);
                if (ok != IMAP_SUCCESS) {
                        stuff->done = TRUE;
+                       unlock_session();
                        return GINT_TO_POINTER(-1);
                }
 
@@ -3539,12 +3701,12 @@ static /*gint*/ void *imap_get_flags_thread(void *data)
                imapset = cur->data;
                if (reverse_seen) {
                        r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN,
-                                                imapset, &lep_uidlist);
+                                                full_search ? NULL:imapset, &lep_uidlist);
                }
                else {
                        r = imap_threaded_search(folder,
                                                 IMAP_SEARCH_TYPE_UNSEEN,
-                                                imapset, &lep_uidlist);
+                                                full_search ? NULL:imapset, &lep_uidlist);
                }
                if (r == MAILIMAP_NO_ERROR) {
                        GSList * uidlist;
@@ -3555,37 +3717,39 @@ static /*gint*/ void *imap_get_flags_thread(void *data)
                        unseen = g_slist_concat(unseen, uidlist);
                }
                
-               r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
-                                        imapset, &lep_uidlist);
-               if (r == MAILIMAP_NO_ERROR) {
-                       GSList * uidlist;
-                       
-                       uidlist = imap_uid_list_from_lep(lep_uidlist);
-                       mailimap_search_result_free(lep_uidlist);
-                       
-                       answered = g_slist_concat(answered, uidlist);
-               }
-
                r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED,
-                                        imapset, &lep_uidlist);
+                                        full_search ? NULL:imapset, &lep_uidlist);
                if (r == MAILIMAP_NO_ERROR) {
                        GSList * uidlist;
-                       
+
                        uidlist = imap_uid_list_from_lep(lep_uidlist);
                        mailimap_search_result_free(lep_uidlist);
-                       
+
                        flagged = g_slist_concat(flagged, uidlist);
                }
-               
-               r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
-                                        imapset, &lep_uidlist);
-               if (r == MAILIMAP_NO_ERROR) {
-                       GSList * uidlist;
-                       
-                       uidlist = imap_uid_list_from_lep(lep_uidlist);
-                       mailimap_search_result_free(lep_uidlist);
-                       
-                       deleted = g_slist_concat(deleted, uidlist);
+
+               if (item->opened || item->processing_pending || item == folder->inbox) {
+                       r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED,
+                                                full_search ? NULL:imapset, &lep_uidlist);
+                       if (r == MAILIMAP_NO_ERROR) {
+                               GSList * uidlist;
+
+                               uidlist = imap_uid_list_from_lep(lep_uidlist);
+                               mailimap_search_result_free(lep_uidlist);
+
+                               answered = g_slist_concat(answered, uidlist);
+                       }
+
+                       r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED,
+                                                full_search ? NULL:imapset, &lep_uidlist);
+                       if (r == MAILIMAP_NO_ERROR) {
+                               GSList * uidlist;
+
+                               uidlist = imap_uid_list_from_lep(lep_uidlist);
+                               mailimap_search_result_free(lep_uidlist);
+
+                               deleted = g_slist_concat(deleted, uidlist);
+                       }
                }
        }
 
@@ -3602,7 +3766,11 @@ static /*gint*/ void *imap_get_flags_thread(void *data)
                msginfo = (MsgInfo *) elem->data;
                flags = msginfo->flags.perm_flags;
                wasnew = (flags & MSG_NEW);
-               flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_MARKED);
+               if (item->opened || item->processing_pending || item == folder->inbox) {
+                       flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_MARKED);
+               } else {
+                       flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
+               }
                if (reverse_seen)
                        flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
                if (gslist_find_next_num(&p_unseen, msginfo->msgnum) == msginfo->msgnum) {
@@ -3612,18 +3780,22 @@ static /*gint*/ void *imap_get_flags_thread(void *data)
                                flags &= ~(MSG_UNREAD | MSG_NEW);
                        }
                }
-               if (gslist_find_next_num(&p_answered, msginfo->msgnum) == msginfo->msgnum)
-                       flags |= MSG_REPLIED;
-               else
-                       flags &= ~MSG_REPLIED;
+               
                if (gslist_find_next_num(&p_flagged, msginfo->msgnum) == msginfo->msgnum)
                        flags |= MSG_MARKED;
                else
                        flags &= ~MSG_MARKED;
-               if (gslist_find_next_num(&p_deleted, msginfo->msgnum) == msginfo->msgnum)
-                       flags |= MSG_DELETED;
-               else
-                       flags &= ~MSG_DELETED;
+
+               if (item->opened || item->processing_pending || item == folder->inbox) {
+                       if (gslist_find_next_num(&p_answered, msginfo->msgnum) == msginfo->msgnum)
+                               flags |= MSG_REPLIED;
+                       else
+                               flags &= ~MSG_REPLIED;
+                       if (gslist_find_next_num(&p_deleted, msginfo->msgnum) == msginfo->msgnum)
+                               flags |= MSG_DELETED;
+                       else
+                               flags &= ~MSG_DELETED;
+               }
                g_relation_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
        }
 
@@ -3636,6 +3808,7 @@ static /*gint*/ void *imap_get_flags_thread(void *data)
        g_string_free(cmd_buf, TRUE);
 
        stuff->done = TRUE;
+       unlock_session();
        return GINT_TO_POINTER(0);
 }
 
@@ -3653,14 +3826,17 @@ static gint imap_get_flags(Folder *folder, FolderItem *item,
 
        GSList *tmp = NULL, *cur;
        
-       if (prefs_common.work_offline && !inc_offline_should_override()) {
+       if (prefs_common.work_offline && 
+           !inc_offline_should_override(
+               _("Sylpheed-Claws needs network access in order "
+                 "to access the IMAP server."))) {
                g_free(data);
                return -1;
        }
 
        tmp = folder_item_get_msg_list(item);
 
-       if (g_slist_length(tmp) == g_slist_length(msginfo_list))
+       if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
                data->full_search = TRUE;
        
        for (cur = tmp; cur; cur = cur->next)
@@ -3680,70 +3856,72 @@ static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
        gboolean flags_set = GPOINTER_TO_INT(user_data);
        gint flags_value = GPOINTER_TO_INT(key);
        hashtable_data *data = (hashtable_data *)value;
-       
+       IMAPFolderItem *_item = data->item;
+       FolderItem *item = (FolderItem *)_item;
+       gint ok = IMAP_ERROR;
+       IMAPSession *session = imap_session_get(item->folder);
+
        data->msglist = g_slist_reverse(data->msglist);
        
        debug_print("IMAP %ssetting flags to %d for %d messages\n",
                flags_set?"":"un",
                flags_value,
                g_slist_length(data->msglist));
-       imap_set_message_flags(data->session, data->msglist, flags_value, flags_set);
        
+       if (session) {
+               lock_session();
+               ok = imap_select(session, IMAP_FOLDER(item->folder), item->path,
+                        NULL, NULL, NULL, NULL, FALSE);
+       }
+       if (ok == IMAP_SUCCESS) {
+               imap_set_message_flags(data->session, data->msglist, flags_value, flags_set);
+       } else {
+               g_warning("can't select mailbox %s\n", item->path);
+       }
+       if (session)
+               unlock_session();
        g_slist_free(data->msglist);    
        g_free(data);
        return TRUE;
 }
 
-static void process_hashtable(void)
+static void process_hashtable(IMAPFolderItem *item)
 {
-       if (flags_set_table) {
-               g_hash_table_foreach_remove(flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
-               g_free(flags_set_table);
-               flags_set_table = NULL;
+       if (item->flags_set_table) {
+               g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
+               g_hash_table_destroy(item->flags_set_table);
+               item->flags_set_table = NULL;
        }
-       if (flags_unset_table) {
-               g_hash_table_foreach_remove(flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
-               g_free(flags_unset_table);
-               flags_unset_table = NULL;
+       if (item->flags_unset_table) {
+               g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
+               g_hash_table_destroy(item->flags_unset_table);
+               item->flags_unset_table = NULL;
        }
 }
 
-static IMAPFolderItem *batching_item = NULL;
-
 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
 {
        IMAPFolderItem *item = (IMAPFolderItem *)_item;
 
        g_return_if_fail(item != NULL);
        
-       if (batch && batching_item != NULL) {
-               g_warning("already batching on %s\n", batching_item->item.path);
-               return;
-       }
-       
        if (item->batching == batch)
                return;
        
-       item->batching = batch;
-       
-       batching_item = batch?item:NULL;
-       
        if (batch) {
+               item->batching = TRUE;
                debug_print("IMAP switching to batch mode\n");
-               if (flags_set_table) {
-                       g_warning("flags_set_table non-null but we just entered batch mode!\n");
-                       flags_set_table = NULL;
+               if (!item->flags_set_table) {
+                       item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
                }
-               if (flags_unset_table) {
-                       g_warning("flags_unset_table non-null but we just entered batch mode!\n");
-                       flags_unset_table = NULL;
+               if (!item->flags_unset_table) {
+                       item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
                }
-               flags_set_table = g_hash_table_new(NULL, g_direct_equal);
-               flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
        } else {
                debug_print("IMAP switching away from batch mode\n");
                /* process stuff */
-               process_hashtable();
+               process_hashtable(item);
+               item->batching = FALSE;
        }
 }
 
@@ -3795,12 +3973,10 @@ static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
 }
 
 static GSList * imap_list_from_lep(IMAPFolder * folder,
-                                  clist * list, const gchar * real_path)
+                                  clist * list, const gchar * real_path, gboolean all)
 {
        clistiter * iter;
-       GSList * item_list;
-       
-       item_list = NULL;
+       GSList * item_list = NULL, *llast = NULL;
        
        for(iter = clist_begin(list) ; iter != NULL ;
            iter = clist_next(iter)) {
@@ -3815,7 +3991,10 @@ static GSList * imap_list_from_lep(IMAPFolder * folder,
                FolderItem *new_item;
                
                mb = clist_content(iter);
-               
+
+               if (mb == NULL)
+                       continue;
+
                flags = 0;
                if (mb->mb_flag != NULL)
                        flags = imap_flags_to_flags(mb->mb_flag);
@@ -3834,13 +4013,13 @@ static GSList * imap_list_from_lep(IMAPFolder * folder,
                        continue;
                }
                
-               if (strcmp(dup_name, real_path) == 0) {
+               if (!all && strcmp(dup_name, real_path) == 0) {
                        g_free(base);
                        free(dup_name);
                        continue;
                }
 
-               if (dup_name[strlen(dup_name)-1] == '/') {
+               if (!all && dup_name[strlen(dup_name)-1] == '/') {
                        g_free(base);
                        free(dup_name);
                        continue;
@@ -3856,8 +4035,12 @@ static GSList * imap_list_from_lep(IMAPFolder * folder,
                    ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
                        new_item->no_select = TRUE;
                
-               item_list = g_slist_append(item_list, new_item);
-               
+               if (item_list == NULL)
+                       llast = item_list = g_slist_append(item_list, new_item);
+               else {
+                       llast = g_slist_append(llast, new_item);
+                       llast = llast->next;
+               }
                debug_print("folder '%s' found.\n", loc_path);
                g_free(base);
                g_free(loc_path);
@@ -3873,7 +4056,7 @@ static GSList * imap_get_lep_set_from_numlist(MsgNumberList *numlist)
 {
        GSList *sorted_list, *cur;
        guint first, last, next;
-       GSList *ret_list = NULL;
+       GSList *ret_list = NULL, *llast = NULL;
        unsigned int count;
        struct mailimap_set * current_set;
        unsigned int item_count;
@@ -3912,8 +4095,13 @@ static GSList * imap_get_lep_set_from_numlist(MsgNumberList *numlist)
                        first = next;
                        
                        if (count >= IMAP_SET_MAX_COUNT) {
-                               ret_list = g_slist_append(ret_list,
+                               if (ret_list == NULL)
+                                       llast = ret_list = g_slist_append(ret_list,
                                                          current_set);
+                               else {
+                                       llast = g_slist_append(llast, current_set);
+                                       llast = llast->next;
+                               }
                                current_set = mailimap_set_new_empty();
                                count = 0;
                                item_count = 0;
@@ -3940,8 +4128,9 @@ static GSList * imap_get_lep_set_from_msglist(MsgInfoList *msglist)
        for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
                MsgInfo *msginfo = (MsgInfo *) cur->data;
 
-               numlist = g_slist_append(numlist, GINT_TO_POINTER(msginfo->msgnum));
+               numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
        }
+       numlist = g_slist_reverse(numlist);
        seq_list = imap_get_lep_set_from_numlist(numlist);
        g_slist_free(numlist);
 
@@ -3960,9 +4149,10 @@ static GSList * imap_uid_list_from_lep(clist * list)
                uint32_t * puid;
                
                puid = clist_content(iter);
-               result = g_slist_append(result, GINT_TO_POINTER(* puid));
+               result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
        }
        
+       result = g_slist_reverse(result);
        return result;
 }
 
@@ -3977,9 +4167,9 @@ static GSList * imap_uid_list_from_lep_tab(carray * list)
                uint32_t * puid;
                
                puid = carray_get(list, i);
-               result = g_slist_append(result, GINT_TO_POINTER(* puid));
+               result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
        }
-       
+       result = g_slist_reverse(result);
        return result;
 }
 
@@ -3991,6 +4181,9 @@ static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
        size_t size = 0;
        MsgFlags flags = {0, 0};
        
+       if (info->headers == NULL)
+               return NULL;
+
        MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
        if (folder_has_parent_of_type(item, F_QUEUE)) {
                MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
@@ -4069,6 +4262,9 @@ void imap_folder_unref(Folder *folder)
 
 static FolderClass imap_class;
 
+static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
+static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
+
 static Folder  *imap_folder_new        (const gchar    *name,
                                         const gchar    *path)
 {
@@ -4091,6 +4287,11 @@ static gint      imap_rename_folder      (Folder         *folder,
        return -1;
 }
 
+gchar imap_get_path_separator_for_item(FolderItem *item)
+{
+       return '/';
+}
+
 FolderClass *imap_get_class(void)
 {
        if (imap_class.idstr == NULL) {
@@ -4102,6 +4303,11 @@ FolderClass *imap_get_class(void)
                imap_class.create_tree = imap_create_tree;
                imap_class.create_folder = imap_create_folder;
                imap_class.rename_folder = imap_rename_folder;
+
+               imap_class.set_xml = folder_set_xml;
+               imap_class.get_xml = folder_get_xml;
+               imap_class.item_set_xml = imap_item_set_xml;
+               imap_class.item_get_xml = imap_item_get_xml;
                /* nothing implemented */
        }
 
@@ -4113,3 +4319,35 @@ void imap_synchronise(FolderItem *item)
 {
        imap_gtk_synchronise(item);
 }
+
+static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
+{
+#ifdef HAVE_LIBETPAN
+       GList *cur;
+#endif
+       folder_item_set_xml(folder, item, tag);
+       
+#ifdef HAVE_LIBETPAN
+       for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
+               XMLAttr *attr = (XMLAttr *) cur->data;
+
+               if (!attr || !attr->name || !attr->value) continue;
+               if (!strcmp(attr->name, "uidnext"))
+                       IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
+       }
+#endif
+}
+
+static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
+{
+       XMLTag *tag;
+
+       tag = folder_item_get_xml(folder, item);
+
+#ifdef HAVE_LIBETPAN
+       xml_tag_add_attr(tag, xml_attr_new_int("uidnext", 
+                       IMAP_FOLDER_ITEM(item)->uid_next));
+
+#endif
+       return tag;
+}