diff --git a/UI/MailerUI/UIxMailActions.m b/UI/MailerUI/UIxMailActions.m
index b21cd160f..71bb05f8f 100644
--- a/UI/MailerUI/UIxMailActions.m
+++ b/UI/MailerUI/UIxMailActions.m
@@ -203,74 +203,4 @@
   return response;
 }
 
-- (WOResponse *) addLabelAction
-{
-  WOResponse *response;
-  SOGoMailObject *co;
-  NSException *error;
-  NSArray *flags;
-  NSString *flag;
-
-  flag = [[[self->context request] formValueForKey: @"flag"] fromCSSIdentifier];
-  co = [self clientObject];
-  flags = [NSArray arrayWithObject: flag];
-
-  error = [co addFlags: flags];
-  if (error)
-    response = (WOResponse *) error;
-  else
-    response = [self responseWith204];
-
-  return response;
-}
-
-- (WOResponse *) removeLabelAction
-{
-  WOResponse *response;
-  SOGoMailObject *co;
-  NSException *error;
-  NSArray *flags;
-  NSString *flag;
-
-  flag = [[[self->context request] formValueForKey: @"flag"] fromCSSIdentifier];
-  co = [self clientObject];
-  flags = [NSArray arrayWithObject: flag];
-
-  error = [co removeFlags: flags];
-  if (error)
-    response = (WOResponse *) error;
-  else
-    response = [self responseWith204];
-
-  return response;
-}
-
-- (WOResponse *) removeAllLabelsAction
-{
-  NSMutableArray *flags;
-  WOResponse *response;
-  SOGoMailObject *co;
-  NSException *error;
-  NSDictionary *v;
-
-
-  co = [self clientObject];
-
-  v = [[[context activeUser] userDefaults] mailLabelsColors];
-
-  // We always unconditionally remove the Mozilla tags
-  flags = [NSMutableArray arrayWithObjects: @"$Label1", @"$Label2", @"$Label3",
-                          @"$Label4", @"$Label5", nil];
-
-  [flags addObjectsFromArray: [v allKeys]];
-
-  error = [co removeFlags: flags];
-  if (error)
-    response = (WOResponse *) error;
-  else
-    response = [self responseWith204];
-
-  return response;
-}
-
 @end
diff --git a/UI/MailerUI/UIxMailFolderActions.m b/UI/MailerUI/UIxMailFolderActions.m
index 0e1ca9123..877a0ada0 100644
--- a/UI/MailerUI/UIxMailFolderActions.m
+++ b/UI/MailerUI/UIxMailFolderActions.m
@@ -618,4 +618,88 @@
   return response;
 }
 
+- (WOResponse *) addLabelAction
+{
+  WOResponse *response;
+  WORequest *request;
+  SOGoMailFolder *co;
+  NSException *error;
+  NSArray *msgUIDs, *flags;
+  NSString *operation;
+  NSDictionary *content;
+  BOOL addOrRemove;
+  NGImap4Client *client;
+
+  request = [context request];
+  content = [[request contentAsString] objectFromJSONString];
+  flags = [content objectForKey:@"flags"];
+  msgUIDs = [content objectForKey:@"msgUIDs"];
+  operation = [content objectForKey:@"operation"];
+  
+  if ([operation isEqualToString:@"add"])
+    addOrRemove = YES;
+  else
+    addOrRemove = NO;
+
+  co = [self clientObject];
+  client = [[co imap4Connection] client];
+  error = [client storeFlags:flags forUIDs:msgUIDs addOrRemove:addOrRemove];
+  if (error)
+    response = (WOResponse *) error;
+  else
+    response = [self responseWith204];
+
+  return response;
+}
+
+- (WOResponse *) removeLabelAction
+{
+  WOResponse *response;
+  SOGoMailObject *co;
+  NSException *error;
+  NSArray *flags;
+  NSString *flag;
+  
+  flag = [[[self->context request] formValueForKey: @"flag"] fromCSSIdentifier];
+  co = [self clientObject];
+  flags = [NSArray arrayWithObject: flag];
+  
+  error = [co removeFlags: flags];
+  if (error)
+    response = (WOResponse *) error;
+  else
+    response = [self responseWith204];
+  
+  return response;
+}
+
+- (WOResponse *) removeAllLabelsAction
+{
+  NSMutableArray *flags;
+  WOResponse *response;
+  SOGoMailObject *co;
+  NSException *error;
+  NSDictionary *v;
+  
+  
+  co = [self clientObject];
+  
+  v = [[[context activeUser] userDefaults] mailLabelsColors];
+  
+  // We always unconditionally remove the Mozilla tags
+  flags = [NSMutableArray arrayWithObjects: @"$Label1", @"$Label2", @"$Label3",
+           @"$Label4", @"$Label5", nil];
+  
+  [flags addObjectsFromArray: [v allKeys]];
+  
+  error = [co removeFlags: flags];
+  if (error)
+    response = (WOResponse *) error;
+  else
+    response = [self responseWith204];
+  
+  return response;
+}
+
+
 @end
diff --git a/UI/MailerUI/product.plist b/UI/MailerUI/product.plist
index 8b9ed30cb..e0130ee8b 100644
--- a/UI/MailerUI/product.plist
+++ b/UI/MailerUI/product.plist
@@ -181,6 +181,21 @@
           pageName    = "UIxMailUserRightsEditor";
           actionName  = "saveUserRights";
         };
+        addLabel = {
+          protectedBy = "View";
+          actionClass = "UIxMailFolderActions";
+          actionName  = "addLabel";
+        };
+        removeLabel = {
+          protectedBy = "View";
+          actionClass = "UIxMailFolderActions";
+          actionName  = "removeLabel";
+        };
+        removeAllLabels = {
+          protectedBy = "View";
+          actionClass = "UIxMailFolderActions";
+          actionName  = "removeAllLabels";
+        };
       };
     };
 
@@ -272,21 +287,6 @@
           actionClass = "UIxMailActions";
           actionName  = "markMessageRead";
         };
-        addLabel = {
-          protectedBy = "View";
-          actionClass = "UIxMailActions";
-          actionName  = "addLabel";
-        };
-        removeLabel = {
-          protectedBy = "View";
-          actionClass = "UIxMailActions";
-          actionName  = "removeLabel";
-        };
-        removeAllLabels = {
-          protectedBy = "View";
-          actionClass = "UIxMailActions";
-          actionName  = "removeAllLabels";
-        };
       };
     };
 
diff --git a/UI/WebServerResources/MailerUI.js b/UI/WebServerResources/MailerUI.js
index f9fa6973e..ac997e7ce 100644
--- a/UI/WebServerResources/MailerUI.js
+++ b/UI/WebServerResources/MailerUI.js
@@ -31,7 +31,7 @@ var pageContent = $("pageContent");
 
 var deleteMessageRequestCount = 0;
 
-var messageCheckTimer;
+var refreshViewCheckTimer;
 
 /* We need to override this method since it is adapted to GCS-based folder
  references, which we do not use here */
@@ -1955,7 +1955,7 @@ function initMailer(event) {
         configureMessageListEvents();
 
         initMailboxTree();
-        initMessageCheckTimer();
+        initRefreshViewCheckTimer();
 
         Event.observe(document, "keydown", onDocumentKeydown);
 
@@ -1975,23 +1975,27 @@ function initMailer(event) {
     Event.observe(window, "resize", onWindowResize);
 }
 
-function initMessageCheckTimer() {
-    var messageCheck = UserDefaults["SOGoMailMessageCheck"];
-    if (messageCheck && messageCheck != "manually") {
+function initRefreshViewCheckTimer() {
+    // TEMPORARY : to be erase
+    var refreshViewCheck = UserDefaults["SOGoMailMessageCheck"];
+    if (refreshViewCheck == null)
+        refreshViewCheck = UserDefaults["SOGoRefreshViewCheck"];
+    
+    if (refreshViewCheck && refreshViewCheck != "manually") {
         var interval;
-        if (messageCheck == "once_per_hour")
+        if (refreshViewCheck == "once_per_hour")
             interval = 3600;
-        else if (messageCheck == "every_minute")
+        else if (refreshViewCheck == "every_minute")
             interval = 60;
         else {
-            interval = parseInt(messageCheck.substr(6)) * 60;
+            interval = parseInt(refreshViewCheck.substr(6)) * 60;
         }
-        messageCheckTimer = window.setInterval(onMessageCheckCallback,
-                                               interval * 1000);
+        refreshViewCheckTimer = window.setInterval(onRefreshViewCheckCallback,
+                                                  interval * 1000);
     }
 }
 
-function onMessageCheckCallback(event) {
+function onRefreshViewCheckCallback(event) {
     refreshMailbox();
 }
 
@@ -2447,8 +2451,8 @@ function onMenuLabelNone() {
         messages.push(Mailer.currentMessages[Mailer.currentMailbox]);
     else if (Object.isArray(document.menuTarget))
         // Menu called from multiple selection in messages list view
-        $(document.menuTarget).collect(function(rowID) {
-            messages.push(rowID.substr(4));
+        $(document.menuTarget).collect(function(row) {
+            messages.push(row.substr(4));
         });
     else
         // Menu called from one selection in messages list view
@@ -2463,40 +2467,51 @@ function onMenuLabelNone() {
 }
 
 function onMenuLabelFlag() {
-    var messages = new Hash();
-
     var flag = this.readAttribute("data-name");
-
-    if (document.menuTarget.tagName == "DIV")
-        // Menu called from message content view
-        messages.set(Mailer.currentMessages[Mailer.currentMailbox],
-                     $('row_' + Mailer.currentMessages[Mailer.currentMailbox]).getAttribute("labels"));
-    else if (Object.isArray(document.menuTarget))
-        // Menu called from multiple selection in messages list view
-        $(document.menuTarget).collect(function(rowID) {
-            var row = $(rowID);
-            if (row)
-                messages.set(rowID.substr(4),
-                             row.getAttribute("labels"));
-        });
-    else
-        // Menu called from one selection in messages list view
-        messages.set(document.menuTarget.getAttribute("id").substr(4),
-                     document.menuTarget.getAttribute("labels"));
-
     var url = ApplicationBaseURL + encodeURI(Mailer.currentMailbox) + "/";
-    messages.keys().each(function(id) {
-        var flags = messages.get(id).split(" ");
-        var operation = "add";
+    var operation = "add";
+    var msgUIDs;
+    var msgLabels;
 
+    if (!Object.isArray(document.menuTarget)) {
+        msgUIDs = Mailer.currentMessages[Mailer.currentMailbox];
+        if (document.menuTarget.tagName == "DIV")
+            // Menu called from message content view
+            msgLabels = $('row_' + msgLabels).getAttribute("labels");
+        else
+            // Menu called from one selection in messages list view
+            msgLabels = document.menuTarget.getAttribute("labels");
+        
+        var flags = msgLabels.split(" ");
         if (flags.indexOf(flag) > -1)
             operation = "remove";
+    }
+    else {
+        // Menu called from multiple selection in messages list view
+        var rows = $(document.menuTarget);
+        var blockedOperation = false;
+        for (var i = 0; i < rows.length; i++) {
+            var row = $(rows[i]);
+            if (row) {
+                msgUIDs.push(rows[i].substr(4));
+                msgLabels = row.getAttribute("labels");
+                
+                var flags = msgLabels.split(" ");
+                if (flags.indexOf(flag) > -1 && !blockedOperation) {
+                    operation = "remove";
+                }
+                else {
+                    blockedOperation = true;
+                    operation = "add";
+                }
+            }
+        }
+    }
 
-        triggerAjaxRequest(url + id + "/" + operation + "Label?flag=" + flag.asCSSIdentifier(),
-                           messageFlagCallback,
-                           { mailbox: Mailer.currentMailbox, msg: id,
-                             label: operation + flag } );
-    });
+    var callbackData = { mailbox: Mailer.currentMailbox, operation: operation, flag: flag };
+    var content = {flags: flag.asCSSIdentifier(), msgUIDs: msgUIDs, operation: operation};
+    content = Object.toJSON(content);
+    triggerAjaxRequest(url + operation + "Label", messageFlagCallback, callbackData, content);
 }
 
 function onMenuToggleMessageFlag(event) {