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

[Mark Sapiro]

On 03/06/2016 05:35 PM, Stephen J. Turnbull wrote:
> 
> 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?


Thanks for bringing this up.

It is definitely still a problem and it is a problem here too, but these
are two separate issues. The issue I raised and which is now fixed is
regarding mail to xxx at mailman3.org. That's where the MX for mailman3.org
should point to a name with an A and not a CNAME record.

I neglected to even think about the full circle DNS which is for
outgoing mail. The issue here is that the server's IP address has no
rDNS PTR record at all. The authority for this is rackspace, so they
would need to install a PTR from 201.228.239.104.in-addr.arpa. (i.e.rDNS
for 104.239.228.201) to mail.mailman3.org. Probably
infrastructure at python.org can help with this.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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