if (XenForo_Helper_Email::emailHasTypo($email))
{
$dw = XenForo_DataWriter::create('XenForo_DataWriter_Discussion_Thread');
$dw->setExistingData($thread);
$dw->delete();
throw $this->getErrorOrNoPermissionResponseException(new XenForo_Phrase(array('email_address_you_entered_appears_have_typo')));
}