and DMARC

Paul Kosinski bind at
Tue Feb 16 23:51:11 UTC 2021

Our DMARC Policy has been "p=quarantine" since 30 Jun 2019, so I guess it won't affect us. (It was "p=none" before that -- we only started using DKIM in Apr 2017.)

On Tue, 16 Feb 2021 20:54:30 +0000 (UTC)
Dan Mahoney <dmahoney at> wrote:

> Greetings bind-users netizens.
> Dan Mahoney, ISC SysAdmin here.
> This is a message about and DMARC.  If you aren't concerned 
> with DMARC, you can ignore it.  
> Over a year ago, we added adaptations to to allow mail from 
> DMARC-protected domains to be delivered.
> If you've seen problems with the way 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 as we are considering making a slightly broader change.
> We are considering setting 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 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

More information about the bind-users mailing list