Хм, что-то не доезжает почта до адресата Статус доставки:
messagedelivery-status1.2
Reporting-MTA: dns; forward12.mail.yandex.net
X-Yandex-Queue-ID: 061CA15D0B0C
X-Yandex-Sender: rfc822; ******@yandex.ru
Arrival-Date: Fri, 13 Nov 2009 14:14:12 +0300 (MSK)
Final-Recipient: rfc822; ecayans@mail.ru
Original-Recipient: rfc822;ecayans@mail.ru
Action: failed
Status: 5.0.0
Remote-MTA: dns; mxs.mail.ru
Diagnostic-Code: smtp; 550 Message was not accepted -- invalid mailbox. Local
mailbox ecayans@mail.ru is unavailable: user not found