Subject: Undeliverable mail: Практическое финансовое моделирование

From: <[email-masked]>
Date: Fri, 24 Oct 2008 15:43:43 +0400

Failed to deliver to '<[email-masked]>'
SMTP module(domain postman.ru) reports:
 host mx.postman.ru says:
 550 [email-masked] unknown user account