Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Mon, 11 Aug 2008 16:51:01 +0300

This is the Postfix program at host wall.deac.lv.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email-masked]
    SMTP error from remote mailer after RCPT TO:<[email-masked]>:
    host mxgt.deac.lv [89.111.5.22]: 550-Callout verification failed:
    550 550 5.1.1 <[email-masked]>... User unknown

------ This is a copy of the message's headers. ------

From: =?koi8-r?B?8NLJzsPJ0NkgwsDE1sXUydLP18HOydE=?= 
	<[email-masked]>
To: <[email-masked]>
Subject: Re:
Date: Mon, 11 Aug 2008 15:50:46 +0200