Subject: Undeliverable mail: От учебного центра по Вашему запросу

From: <[email-masked]>
Date: Wed, 15 Oct 2008 19:59:22 +0400

Failed to deliver to [email-masked]'
SMTP module(domain [85.21.214.82]) reports:
 host 85.21.214.82 says:
 550 5.1.1 User unknown