On Fri, May 24, 2024 at 05:23:55PM +0100, Joe wrote: > On Fri, 24 May 2024 17:17:45 +0200 > <to...@tuxteam.de> wrote: > > > On Fri, May 24, 2024 at 04:49:18PM +0200, Marco Moock wrote: > > > > [...] > > > > > If you operate mail servers, you must have a FQDN. .lan can't be > > > used for the global DNS stuff, so set a proper FQDN that belongs to > > > you. > > > > I think this is wrong in that sweeping generality. > > > > I believe the dynamic DNS services will supply an FQDN if you don't > have one, it just won't be personal, it will be one of theirs. But > trying to run a mail server on a dynamic address leads to all kinds of > blacklist problems.
As far as I know we are talking of local networks all the time. No dynamic IP addresses, no routable IP addresses -- most probably no DNS at all. Of course, if you go "out there" things change drastically. More so if your MTA is supposed to accept mail from "out there" then it needs an MX record, yadda, yadda. But if I understood OP correctly, we are far from this scenario. Cheers -- t
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