Reporting-MTA: dns; a8-87.smtp-out.amazonses.com

Action: failed
Final-Recipient: rfc822; xxxxxxxxx@xxxxxxxxxxxxxx.xxx
Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to reach does not exist. Please try
 550-5.1.1 double-checking the recipient's email address for typos or
 550-5.1.1 unnecessary spaces. Learn more at
 550 5.1.1  https://support.google.com/mail/?p=NoSuchUser h18si1400069wml.60 - gsmtp
Status: 5.1.1