Re: [dmarc-ietf] Is there any recommendation to send DMARC message-specific failure reports FROM:<> ?

Hello John,

in case of modernwebsite.pl:

DNS TXT _dmarc.modernwebsite.pl is "v=DMARC1; p=reject; pct=100;  
rua=mailto:postmaster@modernwebsite.pl;  
ruf=mailto:postmaster@modernwebsite.pl; aspf=s;adkim=s;"

Emails to postmaster@modernwebsite.pl are answered with “Undelivered  
Mail Returned to Sender”.  The answers do not align to the DMARC  
policy reject, so a new message-specific failure repot is sent.

The loop happens, when you do send failure reports, not just receiving such.

Regards
   Дилян

----- Message from John Levine <johnl@taugh.com> ---------
    Date: 25 May 2019 17:53:17 -0400
    From: John Levine <johnl@taugh.com>
Subject: Re: [dmarc-ietf] Is there any recommendation to send DMARC  
message-specific failure reports FROM:<> ?
      To: dmarc@ietf.org
      Cc: Dilyan.Palauzov@aegee.org

> In article  
> <20190525183556.Horde.zvg1bNsYbvs_enKZPKjlhVV@webmail.aegee.org> you  
> write:
>> Consider this scenario: an email from a domain, with DMARC policy
>> “p=reject; ruf=postmaster@domain” fails validation.  A
>> message-specific report is sent to postmaster@domain.  The report is
>> bounced (or there is any reply on it) and the reply is again From:
>> that domain and does not validate DMARC.  In turn a new
>> message-specific report is sent and this loop ends, when some disk
>> gets full.  With FROM:<> or NOTIFY=NEVER there would be no such loop.
>
> The trickle of failure reports I get are from addresses like these:
>
> forensicdmarc@seznam.cz
> mailnull@segv.crash.com
> dmarc-noreply@linkedin.com
> opendmarc@hamartun.priv.no
> prvs=1020be0dc4=noreply@manthorp.com
>
> I would expect that any mail sent to those addresses is unlikely to
> provoke a failure report, no matter how mangled it is when it arrives.
>
> We've had failure reports for almost seven years and I don't ever
> recall someone getting into a mail loop so it's not a problem in
> practice.
>
> _______________________________________________
> dmarc mailing list
> dmarc@ietf.org
> https://www.ietf.org/mailman/listinfo/dmarc

----- End message from John Levine <johnl@taugh.com> -----