[Mailman-Users] cause of bounces

[Grant Taylor]

On 10/17/2017 04:15 PM, Lindsay Haisley wrote:
> Just as an aside here, my understanding is that validation of an email 
> by DMARC requires ONE of two things: EITHER the DKIM signature in the 
> email must validate, OR the domain of the From body header must resolve 
> to the IP address of the Sender system (list server or mail reflector). 
>  Is this correct? Where's a reference on this?

That is a per domain setting left up to the DMARC publisher.

At least my understanding is that you can specify any of the following 
conditions to cause DMARC to pass / fail.

1) /Only/ SPF
2) /Only/ DKIM
3) SPF /or/ DKIM
4) SPF /and/ DKIM



-- 
Grant. . . .
unix || die