Delivery Status Notification (Failure)
Delivery to the following recipient failed permanently: kupc-alex@yandex.ru
Technical details of permanent failure:
550 5.7.1 No such user! 1755873403-haVFvW7EBqM0-YcNRzV7t
Technical details of permanent failure:
550 5.7.1 No such user! 1755873403-haVFvW7EBqM0-YcNRzV7t
68a88e648173c.rfc822-headers