diff --git a/module/message/model.php b/module/message/model.php
index 72ca92a564..9312d318a5 100755
--- a/module/message/model.php
+++ b/module/message/model.php
@@ -114,7 +114,6 @@ class messageModel extends model
                 $this->loadModel('webhook')->send($objectType, $objectID, $actionType, $actionID, $actor);
             }
         }
-
         if(isset($messageSetting['message']))
         {
             $actions = $messageSetting['message']['setting'];
@@ -201,6 +200,14 @@ class messageModel extends model
 
             if(!empty($notifyPersons)) $toList = implode(',', $notifyPersons);
         }
+        if(empty($toList) and $objectType == 'task' and $object->mode == 'multi')
+        {
+            $assignedTo = $this->loadModel('task')->getTeamTaskAssignedTo($object->id);
+            $toList     = array_filter($assignedTo, function($account){
+                return $account != $this->app->user->account;
+            });
+            $toList     = implode(',', $toList);
+        }
 
         if($toList == 'closed') $toList = '';
         if($objectType == 'feedback' and $object->status == 'replied') $toList = ',' . $object->openedBy . ',';
diff --git a/module/task/model.php b/module/task/model.php
index dd57730843..9bf08e1551 100755
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -3921,8 +3921,15 @@ class taskModel extends model
     public function getToAndCcList($task)
     {
         /* Set toList and ccList. */
-        $toList = $task->assignedTo;
-        $ccList = trim($task->mailto, ',');
+        $toList         = $task->assignedTo;
+        $ccList         = trim($task->mailto, ',');
+        $toTeamTaskList = '';
+        if($task->mode == 'multi')
+        {
+            $toTeamTaskList = $this->getTeamTaskAssignedTo($task->id);
+            $toTeamTaskList = implode(',', $toTeamTaskList);
+            $toList         = $toTeamTaskList;
+        }
 
         if(empty($toList))
         {
@@ -4339,4 +4346,19 @@ class taskModel extends model
             $order ++;
         }
     }
+
+    /**
+     * Get teamTask assignedTo.
+     *
+     * @param  int    $taskID
+     * @access public
+     * @return array
+     */
+    public function getTeamTaskAssignedTo($taskID)
+    {
+        $taskType = $this->dao->select('mode')->from(TABLE_TASK)->where('id')->eq($taskID)->fetch('mode');
+        if($taskType != 'multi') return array();
+        $assignedToList = $this->dao->select('account')->from(TABLE_TASKTEAM)->where('task')->eq($taskID)->fetchPairs();
+        return empty($assignedToList) ? array() : array_keys($assignedToList);
+    }
 }