> On Mon, Aug 10, 2026 at 11:48:19PM -0400, John Levine via mailop wrote:
>
> > >John, maybe I should ask on the Postfix list but sicne you mentioned
> > >it; this doesn't cause issues with "real" servers who don´t wait to
> > >talk then?
> >
> > As far as I know, there's no such thing. Real servers all wait for
> > the greeting. Anything that doesn't is a spambot.
>
> A small minority of legitimate servers could be (mis)configured with
> excessively short greeting timeouts, but this is not common, and the
> traffic they send likely to be of low value.
The administrators of those servers will find out that they'll need
to update their configurations should any of their users ever
complain about messages always bouncing from certain MXs, because
many users will enquire or complain about it.
I'm not worried about them, and I don't think anyone else should be
either, because the initial-delay-alternative-to-greylisting approach
that I've encountered easily falls within the confines of the typical
socket timeouts used in production environments anyway.
--
Postmaster - [email protected]
Randolf Richardson, CNA - [email protected]
Inter-Corporate Computer & Network Services, Inc.
Vancouver, Beautiful British Columbia, Canada
https://www.inter-corporate.com/
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