[Mailman-Developers] Mailman 3 on lists.mailman3.org

[Stephen J. Turnbull]

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