Hi all!

Looking for a little guidance.

I've recently removed a postfix relay MTA with IP All seems to be working well on our zimbra server with the exception of our deferred mail queue.

Messages that should be bounced because of a bad address are instead queuing up. In the admin GUI, the reason given is "delivery temporarily suspended: connect to[]:25: no route to host.

At first I thought I missed something in DNS, but is no longer listed in any of our mx records.

Why does zimbra seem to be trying to send messages from unknown addresses in our domain to the old relay MTA?