Mark Sapiro writes: > On 03/06/2016 09:37 AM, Barry Warsaw wrote: > > On Mar 05, 2016, at 04:14 PM, Mark Sapiro wrote: > > > >> The issue is that there is an MX record for mailman3.org pointing to > >> mail.mailman3.org, but mail.mailman3.org doesn't have an A record; it > >> has a CNAME pointing to mailman.iad1.psf.io which is the canonical name > >> of the server. > ... > > Fixed by setting mail. to an A record. Give it time to > > propagate, and it has a 3h TTL. > > > Looks good. Thanks Barry.
But note that as a practical matter some receiving sites demand (or use to demand) that a sender's PTR roundtrip (ie, A -> PTR -> same A). Is that not a problem any more? Steve _______________________________________________ Mailman-Developers mailing list Mailman-Developers@python.org https://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9