- Unsubscribe from non-existing folders always (on listing), not only in Settings/Folders UI

program/include/rcube_imap.php

@@ -3083,20 +3083,36 @@ class rcube_imap
                 $a_folders = $this->conn->listMailboxes($root, $name,
                     NULL, array('SUBSCRIBED'));
 
-                // remove non-existent folders
-                if (is_array($a_folders)) {
+                // unsubscribe non-existent folders, remove from the list
+                if (is_array($a_folders) && $name == '*') {
                     foreach ($a_folders as $idx => $folder) {
                         if ($this->conn->data['LIST'] && ($opts = $this->conn->data['LIST'][$folder])
                             && in_array('\\NonExistent', $opts)
                         ) {
+                            $this->conn->unsubscribe($folder);
                             unset($a_folders[$idx]);
-                        } 
+                        }
                     }
                 }
             }
             // retrieve list of folders from IMAP server using LSUB
             else {
                 $a_folders = $this->conn->listSubscribed($root, $name);
+
+                // unsubscribe non-existent folders, remove from the list
+                if (is_array($a_folders) && $name == '*') {
+                    foreach ($a_folders as $idx => $folder) {
+                        if ($this->conn->data['LIST'] && ($opts = $this->conn->data['LIST'][$folder])
+                            && in_array('\\Noselect', $opts)
+                        ) {
+                            // Some servers returns \Noselect for existing folders
+                            if (!$this->mailbox_exists($folder)) {
+                                $this->conn->unsubscribe($folder);
+                                unset($a_folders[$idx]);
+                            }
+                        }
+                    }
+                }
             }
         }
 

program/steps/settings/folders.inc

@@ -278,9 +278,6 @@ function rcube_subscription_form($attrib)
         $display_folder = str_repeat('    ', $folder['level'])
             . Q($protected ? rcmail_localize_foldername($folder['id']) : $folder['name']);
 
-        if ($sub_key !== false)
-            unset($a_subscribed[$sub_key]);
-
         if ($folder['virtual']) {
             $classes[] = 'virtual';
         }
@@ -329,11 +326,6 @@ function rcube_subscription_form($attrib)
             Q($display_folder), $protected || $folder['virtual']);
     }
 
-    // Unsubscribe from non-existing folders
-    foreach ($a_subscribed as $folder) {
-        $IMAP->unsubscribe($folder);
-    }
-
     $RCMAIL->plugins->exec_hook('folders_list', array('table' => $table));
 
     $OUTPUT->add_gui_object('subscriptionlist', $attrib['id']);