[clamav-users] OT: DMARC

[Walter H.]

On Wed, June 27, 2018 20:04, Dianne Skoll wrote:
> Hi,
>
> Not unexpectedly, this list is breaking DMARC and DKIM. Any chance of
> mitigating this?
>
> 0.1	DKIM query returned fail (body has been altered) (d=cisco.com)
>
> Quarantined due to DMARC policy DMARC_POLICY_QUARANTINE for domain
> cisco.com

this is with any mailling list, because, as soon as you add something like

<begin>
----------
mailling list ...
<end>

you alter the mail body, but this breaks DKIM only in case it includes the
mail body; and this is unusual, because for the mail body you have other
ways like S/MIME or PGP signatures

some mailing lists don't alter the mail body, in order not to break and
digital mail signatures like S/MIME or PGP - the prefered way a mailing
list should work;

and mailling list servers send the mails without changing the From-Header;
and to face the SPF problems use their own address in the MAIL
FROM-Envelope;