On 2022-06-15 at 23:53 +0200, Axel Rau wrote: > > > > Am 15.06.2022 um 20:42 schrieb Ken O'Driscoll: > > > > This is incorrect. The return-path is the address used by receiving > > the MTA to send bounce messages to when the recipient's 5322.From > > is unreachable for whatever reason. > > Yes. But the point was "do I need a MX to receive these bounce > messages?“ > My listservers return-path address is reachable all the time w/o MX > and occasionally gets one. > > Axel
There is a fallback of connecting to the A record on port 25 if there is no MX. However, I would recommend to include a proper MX record and not rely on the "implicit MX rule" unless you have no other option. An email address whose domain doesn't have a MX record is suspicious at least. And obviously, add a SPF record to that domain as well. Regards _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
