This is the mail system at host mailgw01.tarassul.sy.
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                   The mail system

<abuse@tarassul.sy>: host 82.137.201.8[82.137.201.8] said: 550 User <abuse>
    unknown (in reply to RCPT TO command)

Final-Recipient: rfc822; abuse@tarassul.sy
Original-Recipient: rfc822;abuse@tarassul.sy
Action: failed
Status: 5.0.0
Remote-MTA: dns; 82.137.201.8
Diagnostic-Code: smtp; 550 User <abuse> unknown