OT postfix multiple instances and recipient verification

Erik Weber twiztar at gmail.com
Tue Sep 28 09:34:12 IST 2010

On Tue, Sep 28, 2010 at 10:13 AM, Jason Ede
<J.Ede at birchenallhowden.co.uk> wrote:
> I’m thinking of using multiple postfix instances to split up emails with
> multiple recipients (to make sure blacklisting and whitelisting works
> properly) and maybe to sign some outbound emails using domain keys…
> From what I’ve read on the postfix documentation I’ll have an inbound
> postfix instance that just passes all email on internally via a port I
> specify to the next instance where MS does its work and then sends it on to
> the destination server. All of this seems relatively straightforward so far.
> However, I use recipient verification to make sure we only accept emails
> that can be delivered. As the inbound postfix will not have any direct SMTP
> out then will this still work as it won’t be able to check where the emails
> are going to as it just passes all emails on to another port? I could put a
> transports file in place, but surely that would contradict a relayhosts
> setting in main.cf?

Take a look at addess_verify_default_transport and/or
address_verify_transport_maps (and the other address_verify_*
settings), they're there for settings like these.


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