Kenneth Porter via Postfix-users:
> How would I configure a firewall server to forward to an internal server
> over an authenticated submission connection? The examples I'm reading
> seem to show an unauthenticated connection to port 25. I expect I'd use
> a custom internal user for this.
>
> Reference:
> https://www.postfix.org/STANDARD_CONFIGURATION_README.html#firewall
In the text replace
example.com relay:[inside-gateway.example.com]
with
example.com relay:[inside-gateway.example.com]:port
The port can be numeric (465, 587) or symbolic (smtps, submissions,
submission).
Configure SASL AUTH or TLS certificate authentication as appropriate.
Wietse
> I'm migrating from sendmail to postfix. I've got a hosted server running
> sendmail receiving email for my domain and am fetching from its local
> accounts with fetchmail running in a loop on my internal sendmail
> server. It looks like the postfix firewall configuration would allow me
> to switch this from a "pull" setup to a "push" setup, eliminating
> fetchmail and its loop delay from the equation.
>
>
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