Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Wed, 3 Sep 2008 22:35:40 +0300 (EEST)

The original message was received at Wed, 3 Sep 2008 22:35:37 +0300 (EEST)
from 83.68.76.194.brzesko76.tnp.pl [83.68.76.194]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.7.1 Message rejected (no valid recipients).)

   ----- Transcript of session follows -----
... while talking to mailer.upiauto.ua.:
>>> DATA
<<< 550 5.7.1 Message rejected (no valid recipients).
554 5.0.0 Service unavailable