De Petter Mattheas:
> Hello and thanks for the suggestion.
>
>
> The thing is I need this in the transport map, as we have to do this for each
> sub domain.
There is no support for multiple TCP ports in transport maps,
but there is a different solution.
> Vessel A = *@vessel_A.domain.com
> Has smtp relay 1 = a ip adress:25
> Has Smtp 2 relay as backup with ipadress and port 20026
Configure an extra SMTP service on port 20026 on smtp relay 1. You
can configure Postfix to receive mail on any TCP port. Other mail
software may also be able to do that.
Then specify in transport maps:
query reply
============================================
vessel_A.domain.com vessel_A.domain.com:20026
And set up MX records:
vessel_A.domain.com IN MX 10 smtp-relay-1
vessel_A.domain.com IN MX 20 smtp-relay-2
Wietse
