lists.isc.org and DMARC

[Dan Mahoney]

Greetings bind-users netizens.

Dan Mahoney, ISC SysAdmin here.

This is a message about lists.isc.org and DMARC.  If you aren't concerned 
with DMARC, you can ignore it.  

Over a year ago, we added adaptations to lists.isc.org to allow mail from 
DMARC-protected domains to be delivered.

If you've seen problems with the way lists.isc.org currently handles DMARC 
(rewriting the From: header if your sending-domain has a restrictive 
[p=reject or p=quarantine] DMARC policy), we'd like to hear from you at 
listmaster at isc.org as we are considering making a slightly broader change.

We are considering setting lists.isc.org to ALSO rewrite the From: header, 
even if your sending-domain has a DMARC (p=none) policy.  We think this is 
important because otherwise a domain, in rolling out DMARC with p=none to 
start, will see false positives from mailing lists (indicating that 
messages sent via that list would be rejected by the final recipients' 
mailservers/filters).

We believe it makes sense for lists.isc.org to behave the same for *ANY* 
DMARC policy and are considering implementing that in the next few weeks.  
We will keep you updated here.

-Dan Mahoney
ISC