Wietse Venema wrote on 2/10/23 08:24:
D. R. Evans:
I have a postfix setup that, for a long time, has done exactly what I want.
But now I have to change something and I have no idea how to make this
particular change:
E-mail from several domains are sourced on my network. Now I need to treat
e-mail with the From: line
u...@domain1.com
differently from e-mail with the From: line
otheru...@domain2.com
Until now, both those From: lines have been treated the same -- some
processing, then mostly sent to a relayhost, with some specific destinations
handled via the transport map; but now I need to send all e-mails with the
second From: line to a different relayhost from the one that handles the first
From: line.
There are two features that support sender-dependent routing:
sender_dependent_relayhost_maps
This looks up a relayhost value that depends on sender.
Like relayhost, this uses default_transport.
It is seached with the envelope sender address and @domain.
sender_dependent_default_transport_maps
This overrides transport and destination.
It is seached with the envelope sender address and @domain.
In most cases, sender_dependent_relayhost_maps will do the job.
sender_dependent_default_transport_maps can be used to implement
quality of service for different senders.
I've spent far too long trying to get things to work :-( So I'm meekly
returning to ask for further assistance.
Some more background:
I want everything EXCEPT e-mail from the domain @arrl.net to be handled the
way it currently is handled, because that works.
E-mail from @arrl.net is to be relayed to pobox.com for them to handle.
pobox.com has a page telling how to configure postfix:
https://www.pobox.help/hc/en-us/articles/1500000193782-Postfix
but of course that assumes that all traffic is going to be sent to pobox, so
global parameters are truly global, and not confined to traffic from @arrl.net.
The first thing that the above page tells me to do is:
smtp_tls_security_level = encrypt
But if I make that single change and then try to send an e-mail (not from
@arrl.net), my postfix server says:
TLS is required, but is not offered by host 127.0.0.1[127.0.0.1]
this makes sense (I think) because the change I made tells postfix to use TLS
encryption for all e-mails, which isn't what I want :-(
So... help! Please!
Doc
PS Basically, this comes down to:
if sending domain is @arrl.net
use one configuration (a new one, different from what currently exists)
else
use a quite different configuration (that is known to work)
--
Web: http://enginehousebooks.com/drevans
