offtopic: rant about thoughtless enabling DMARC checks

Noel Butler noel.butler at
Mon Feb 11 01:42:19 EET 2019

On 10/02/2019 12:49, Benny Pedersen via dovecot wrote:

> fixing mailman will be the fail, solve it by letting opendkim and opendmarc not reject detected maillist will be solution,

A general broad mailing list whitelist will be problematic, do work it
needs to look for specific list type hidden headers,  spammers and
nasties will incorporate those headers into their trash that
impersonates mailing lists and voila, they pass. there is no quick and
easy fix to the dmarc mess other than p=none aspf=s (DKIM is another one
that gets narky at lists, and despite all the spf haters dreams, I've
never had a problem with spf and lists, and we were an early beta
adopter of spf) 

Kind Regards, 

Noel Butler 

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