protected function processReceivedMail(PhabricatorMetaMTAReceivedMail $mail, PhabricatorUser $sender)
 {
     $task = ManiphestTask::initializeNewTask($sender);
     $task->setOriginalEmailSource($mail->getHeader('From'));
     $handler = new ManiphestReplyHandler();
     $handler->setMailReceiver($task);
     $handler->setActor($sender);
     $handler->setExcludeMailRecipientPHIDs($mail->loadAllRecipientPHIDs());
     if ($this->getApplicationEmail()) {
         $handler->setApplicationEmail($this->getApplicationEmail());
     }
     $handler->processEmail($mail);
     $mail->setRelatedPHID($task->getPHID());
 }