Permanent Delivery Failure

[MDaemon@xxxxxxxxxxx]

The attached message had PERMANENT fatal delivery errors!

After one or more unsuccessful delivery attempts the attached message has
been removed from the mail queue on this server.  The number and frequency
of delivery attempts are determined by local configuration parameters.

YOUR MESSAGE WAS NOT DELIVERED TO ONE OR MORE RECIPIENTS!

--- Session Transcript ---
 Mon 2008-05-12 12:52:32: Parsing Message <xxxxxxxxxxxxxxxxxxxxxxxx\pd50002956575.msg>
 Mon 2008-05-12 12:52:32: From: cvs-orca@xxxxxxxxxxxxxx
 Mon 2008-05-12 12:52:32: To: esavina@xxxxxxxx
 Mon 2008-05-12 12:52:32: Subject: [***SPAM*** Score/Req: 12.9/10.0] =?koi8-r?B?88/axMHOycUgxsnMycHMz9c=?=
 Mon 2008-05-12 12:52:32: Message-ID: <000a01c8b40d$012e30cf$9098528e@mkpakwsq>
 Mon 2008-05-12 12:52:32: Route slip host: 192.168.50.55
 Mon 2008-05-12 12:52:32: Route slip port: 25
 Mon 2008-05-12 12:52:32: Attempting SMTP connection to [192.168.50.55 : 25]
 Mon 2008-05-12 12:52:32: Waiting for connection...
 Mon 2008-05-12 12:52:32: Connection established (192.168.50.54 : 4524 -> 192.168.50.55 : 25)
 Mon 2008-05-12 12:52:32: Waiting for protocol initiation...
 Mon 2008-05-12 12:52:32: <-- 220 mx.ruses.ru ESMTP Service (Lotus Domino Release 6.5.3) ready at Mon, 12 May 2008 12:52:32 +0400
 Mon 2008-05-12 12:52:32: --> EHLO mx.ruses.ru
 Mon 2008-05-12 12:52:32: <-- 250-mx.ruses.ru Hello mx.ruses.ru ([192.168.50.54]), pleased to meet you
 Mon 2008-05-12 12:52:32: <-- 250-HELP
 Mon 2008-05-12 12:52:32: <-- 250-AUTH LOGIN
 Mon 2008-05-12 12:52:32: <-- 250-SIZE
 Mon 2008-05-12 12:52:32: <-- 250 PIPELINING
 Mon 2008-05-12 12:52:32: --> MAIL From:<cvs-orca@xxxxxxxxxxxxxx> SIZE=8766
 Mon 2008-05-12 12:52:32: <-- 250 cvs-orca@xxxxxxxxxxxxxxxxx Sender OK
 Mon 2008-05-12 12:52:32: --> RCPT To:<esavina@xxxxxxxx>
 Mon 2008-05-12 12:52:32: <-- 550 esavina@xxxxxxxxxxx No such user
--- End Transcript ---