On Sat, Jun 15, 2024 at 07:06:43PM +0800, Jeff Peng via Postfix-users wrote:
> On 2024-06-15 18:14, John Levine via Postfix-users wrote:
> > People I'm working with have a short list of addresses from which they
> > don't want to accept mail at all, and they'd like to reject as early
> > as possible without running it through anti-spam milters, ideally by
> > rejecting the SMTP MAIL FROM command. What's the best way to do this?
> > The list is short so if it has to be hand-edited into config files,
> > that's OK.
> >
> > I'm not sure exactly why they want to do it this way but they have
> > been running mail systems for a long time (some of you surely know
> > them) and I assume they have sensible reasons.
>
> I think postscreen can block them easily.
Actually, no, because postscreen typically does not look at the sender
address, generally, just the client IP address is considered.
No reason to post a vague guess, when a concrete approach was requested.
--
Viktor.
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