I added a new domain relay.com which uses the option Relay this domain
and Relay all recipients
.
Everything received should be relayed, so I created a Transport Map with destination .*relay\.com
and the Next hop of another Postfix server.
When sending an E-Mail to eg. test@relay.com i get following error in the Mailcow Postfix Logs:
27DF9EAAC8: to=<test@relay.com>, relay=none, delay=61, delays=1/0.02/60/0, dsn=4.4.1, status=deferred (connect to hostname-of-mailcow.example.com[1.2.3.4]:25: Connection timed out)
Happy about any ideas. Thanks!