On 05-18-2021 10:51 am, Wietse Venema wrote:
You want Postfix X to forward a recipient to Postfix Y (the MX).
You want Postfix Y to deliver that recipient to Postfix X.

That is a loop. It can be broken with multiple instances, content_filter,
or smtpd_proxy_filter.

Not exactly.

Yes i want postfix X to deliver a recipient to postfix Y only if postfix Y is the receiving mx for that domain, otherwise postfix X will deliver to the appropriate mx server out in the world.

Postfix Y never delivers a recipient to postfix X, postfix Y delivers to maildir or bounces user unknown. Postfix Y doesn't know postfix X exist.


You also appear to be unaware that transport_maps has no effect on
the Postfix SMTP daemon. Only the parameters in
http://www.postfix.org/smtpd.8.html have an effect.

Yes, i am unaware. Thank you, i will read over that.

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