Delivery Status Notification (Failure)
Delivery to the following recipient failed permanently: 7777vdv@mai.ru
Technical details of permanent failure:
550 5.1.1 <7777vdv@mai.ru>… User unknown
Technical details of permanent failure:
550 5.1.1 <7777vdv@mai.ru>… User unknown
68a88ee50e111.rfc822-headers