Dnia 26.01.2025 o godz. 16:28:14 Gerben Wierda via Postfix-users pisze:
> 
> So, what happens is: the spammer delivers to the secondary, the secondary
> delivers to the primary, the primary rejects. The secondary then sends an
> undeliverable message to the sender.

Then discard messages that are coming from the secondary MX to the primary,
and reject if they are sent directly to primary.
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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