Reporting-MTA: dns; starling.ukcod.org.uk Action: failed Final-Recipient: rfc822;xxxxxx@xxxxxxxxxx.xxx.xx Status: 5.0.0 Remote-MTA: dns; ASPMX.L.GOOGLE.COM 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 k11si8134839wma.16 - gsmtp