Subject: Undeliverable mail: Это тот учебный курс

From: <[email-masked]>
Date: Tue, 23 Sep 2008 14:51:15 +0400

Failed to deliver to [email-masked]'
SMTP module(domain [85.21.12.4]) reports:
 host 85.21.12.4 says:
 550 <[email-masked]>: Recipient address rejected: User unknown in relay recipient table