Subject: Undeliverable mail: Возможности оперативного управления

From: <[email-masked]>
Date: Wed, 24 Sep 2008 20:08:56 +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