On Thu, Oct 05, 2023 at 10:44:43AM +0700, Olivier via Postfix-users wrote:
> How is it possible to configure Postfix to filter messages of the
> form: from invalidu...@mydomain.com to validu...@mydomain.com
>
> I have been receiving quite a lot recently and they are trash.
https://www.postfix.org/postconf.5.html#smtpd_reject_unlisted_sender
https://www.postfix.org/postconf.5.html#reject_unlisted_sender
--
Viktor.
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