Hi,
Someone send me hints in PM.
It is all about creating an extra filter like:
```
(...)
table fcrdns_bogus file:/etc/mail/fcrdns_bogus
(...)
filter "fcrdns_bogus" phase connect match src <fcrdns_bogus> bypass
```
and it now works as expected.
Cheers,
Joel C.
Le Tue, Jun 02, 2026 at 01:42:32AM +0200, Thomas Bohl a écrit :
> Hi
>
> > I have setup a filter that drops bad FCrDNS using:
> >
> > filter "fcrdns" phase connect match !fcrdns disconnect "550 Bad FCrDNS."
> >
> > That filter is used by my public listen directive. But I have a particular
> > server/domain that fails that test - and they won’t configure it properly.
> > Still I need to receive email from them.
> >
> > Can I (and how) setup a rule (or condition) that bypasses this check for
> > their particular domain name or server IP?
>
>
> I thought it works like this:
>
>
>
> table goodip file:/etc/mail/good-ips
>
> filter "bypass" phase connect match src goodip bypass
>
> listen on ... port 25 ... filter { "bypass", "fcrdns" }
>
>
>
> But I did some testing and it doesn't work. It's like the table isn't
> considered at all. If I write "!src" everyone bypasses fcrdns. Which is at
> least consistent.
>
>
> https://man.openbsd.org/table#Source_tables says:
> "Source tables are lists of IPv4 and IPv6 addresses. They can only be used
> in the following context:
>
> action name relay src <table>"
>
>
> ..what format is "src <table>" from
> https://man.openbsd.org/smtpd.conf#MAIL_FILTERING then?
>
--
Bonne journée,
Joel C.
