Site management is restored, but email still failing - ----- Transcript of session follows -----553 5.3.5 mail.xxx-net.co.uk. config error: mail loops back to me (MX problem?) 554 5.3.5 trevor@xxxxxxxxxxxxxxxx Local configuration error
This is the classic "no mail server alias defined" problem.Make sure the Mail Server Alias field in the site settings has "example.com" filled in. Without it, only mail for user@xxxxxxxxxxxxxxx will be accepted. With it, mail for user@xxxxxxxxxxx will be accepted as well.