Reporting-MTA: dns; mtsspam02.mtdom.net
Arrival-Date: Wed, 09 May 2018 19:16:51 +0200

Final-Recipient: rfc822; xx@xxxxxx.xx
Status: 5.7.54
Action: failed
Last-Attempt-Date: Wed, 09 May 2018 19:16:51 +0200
Diagnostic-Code: smtp; 550 5.7.54 SMTP; Unable to relay recipient in non-accepted domain