Bounces due to old domain name

Hi, having just got one issue solved I've just noticed another. When users have an auto responder on or mail forwarding to another address has been set up for them by an admin, people sending them mail get bounces with a message in /var/log/mail.log like

MarĀ  7 23:13:10 srv postfix/smtp[32338]: 93E841FEDD9: to=<>,[]:25, delay=21564, delays=21564/0.01/0.61/0.03, dsn=4.1.8, status=deferred (host[] said: 450 4.1.8 <>: Sender address rejected: Domain not found (in reply to RCPT TO command))

Now the odd thing is that doesn't exist any more. It did when the domain and the account were originally set up in virtualmin but since then we have moved to a new server and the account has been migrated using Virtualmin's backup and restore.

It looks like I missed a step or for some other reason there's still a reference to hanging around in the setup. I can't find it in any obvious Virtualmin or Webmin admin screens and can't see it with

grep -r '' /etc/postfix/


grep -r '' /etc/webmin

Any ideas where to find it?



Does the domain perhaps appear in the autoreply text file?