[opendmarc-dev] draft: patch to implement an override mechanism for MLMs

[Marco Favero]

Il 24/10/2017 11:31, Steven M Jones ha scritto:

> Okay, but what happens when spammers - some of whom monitor open source
> projects like OpenDMARC - notice that they will be allowed through if
> they just add one or more List-* headers to their messages? They'll add
> those headers, and happily send through your filter.
[...]

Hello Steven,

  I totally agree :(
I'm still looking for a way to apply DMARC to my inbound emails. 
Unfortunately, while spammers are very careful to any protocol and 
filtering details, many PA operators where I live aren't. I recently saw 
NEW mailing list implementation not DMARC compliant...

:-(

So I'm looking for some compromises to:

- apply DMARC in a whole situation as possible
- don't apply DMARC in some circumstances; without manual adjustments, 
if possible.

Combine headers and other Authentication Results is a possible solution. 
Fastmail also released a free milter that use headers to make exception.

No good solutions until spammers will be more careful than legit senders...

Bye

  Marco