Hi to everyone!
My name is Matias Kruk. And I'm in charge of an email marketing company. We
send newsletters and campaigns on behalf of our clients.
We have implemented DKIM and SPF. And now we want to implement DMARC.
I'm digging into and I found this in DMARC
Faq<http://www.dmarc.org/faq.html#s_3>.
And it says about mailing lists:

DMARC introduces the concept of* aligned identifiers. It means the domain
in the from header must match the d= in the DKIM signature and the domain
in the mail from envelope.*
You have a few solutions:

   1. operate as a strict forwarder, where the message is not changed and
   the validity of the DKIM signature is preserved
   2. *introduce an "Original Authentication Results" header to indicate
   you have performed the authentication and you are validating it*
   3. take ownership of the email, by removing the DKIM signature and
   putting your own as well as changing the from header in the email to
   contain an email address within your mailing list domain.

In our case the from header not matches with DKIM's d tag. So I think we
should implement the solution #2 ( "Original Authentication Results"). I
tried asking in PowerMTA forums and support, but it doesn't help me too
much.
Does someone in the list have experience in this?
Thanks in advance

-- 
Inf. Eng. Matias Kruk
Skype: matiaslkruk
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