It would be nice in the authentication-results with iprev, but
unfortunately there is no field to store the rDNS, best you have is the
smtp.helo
http://www.iana.org/assignments/email-auth/email-auth.xhtml#email-auth-methods


On Tue, Sep 29, 2015 at 11:37 AM, A. Schulze via dmarc-discuss <
[email protected]> wrote:

>
> A. Schulze via dmarc-discuss:
>
> Feedback-Type: auth-failure
>> Version: 1
>> User-Agent: OpenDMARC-Filter/1.3.1
>> Auth-Failure: dmarc
>> Authentication-Results: mymta.example.com; dmarc=fail header.from=
>> paypal.com
>> Original-Envelope-Id: 12345
>> Original-Mail-From: [email protected]
>> Source-IP: 192.0.2.25
>> Reported-Domain: paypal.com
>>
>
> I would like to extend the report to include the rDNS for $Source-IP.
> Which name could I use? "Source-Host: mail.example.net" may be right or
> wrong.
>
> Thanks
>
>
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