MAIL DELIVERY 550 5.7.1 ERROR

GOT IT!

If you get this error it is most likely a “mailing list” as the receiver and the mailing list is closed to outside recipients.

The mail system <[email protected]>: host 109.228.47.115[109.228.47.115] said: 550
5.7.1 [email protected] (headers) may not send mail to
[email protected] (in reply to end of DATA command)
Original-Recipient: rfc822;[email protected]co.uk
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp; 550 5.7.1 [email protected] (headers) may not send
mail to [email protected]