Reporting-MTA: dns; a8-79.smtp-out.amazonses.com

Action: failed
Final-Recipient: rfc822; xxxxxxxx@xxxxxxxxxxxxxxxx.xxx
Diagnostic-Code: smtp; 550 permanent failure for one or more recipients (xxxxxxxx@xxxxxxxxxxxxxxxx.xxx:550 5.4.1 Recipient address rejected: Access denied. For more information see https://a...)
Status: 5.3.0