Re: [boost] Mangled "From" field in mailing list posts

Subject: Re: [boost] Mangled "From" field in mailing list posts
From: Olaf van der Spek (ml_at_[hidden])
Date: 2017-06-13 11:59:30

On Tue, Jun 13, 2017 at 10:22 AM, Vladimir Prus via Boost
<boost_at_[hidden]> wrote:
> thanks for the explanation. So, if I understand correctly, the problem
> is that some *senders* have their domains configured to ask recipients
> to reject emails that don't pass DKIM or SPF? In other words, the question
> is not how many organizations have DMARC for inbound authentication, but how
> many users are sending emails to a mailing list
> (which, by definition, forwards email with modifications) while also
> requesting than any forwared with modifications emails are rejected by
> recipients? How many such sending users/domains do we have?
>
> I personally think it would be reasonable to just require that posters
> don't use such domain configuration.

Doesn't gmail also use dmarc?

> If that's not possible, can't we make Mailman not add any footers, and
> don't add any DKIM signature of its own. Maybe, that will cause original
> DKIM signature to remain valid and DMARC check to pass?

The original From header is still problematic AFAIK.

-- 
Olaf