Konstantin:
> Hello,
>
> I need to configure a second MTA on the same server.
> You can tell that this does not make sense but this is a workaround for one
> issue i have.
>
> Postfix listen on port 225 and another MTA on port 25.
> postfix has transport_maps enabled
> transport_maps = hash:/etc/postfix/transport
> * smtp:[127.0.0.1]:25
>
> The problem is after postfix accept message it is bounced with following
> error:
>
> Sep 4 16:15:44 localhost postfix/smtp[19281]: 3hpnDw0zVmz3NyKq: to=<
> u...@domain.com>, relay=none, delay=0.11, delays=0.11/0/0/0, dsn=5.4.6,
> status=bounced (mail for 127.0.0.1 loops back to myself)
You need to do these two:
1a) Remove 127.0.0.1 from the sending MTA's mynetworks.
1b) Use a different myhostname setting in the sending MTA.
Or this one:
2) Send to a TCP port other than 25.
Wietse
