On Fri, Apr 07, 2023 at 10:07:08AM +0800, Ken Peng via Postfix-users wrote:
> i have the similar questions on these two clauses:
>
> reject_unknown_reverse_client_hostname
> reject_unknown_client_hostname
>
> I know the first one require the sender IP has a valid PTR.
> but for the second one, what's unknown client hostname?
> does it mean the PTR hostname must point to the sender IP as well?
The documentation might be a good place to look:
http://www.postfix.org/postconf.5.html#reject_unknown_client_hostname
--
Viktor.
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