[RndTbl] Gmail spam filtering super-aggressive lately

[Hartmut W Sager]

Gmail spam, again.  They still don't like you.  :)

Hartmut W Sager - Tel +1-204-339-8331


On Thu, 2 Apr 2020 at 12:46, Alberto Abrao <alberto at abrao.net> wrote:

> I wonder what'll happen with this one...
>
> Alberto Abrao
> 204-202-1778
> 204-558-6886
> www.abrao.net
>
> On 2020-04-02 3:27 a.m., Trevor Cordes wrote:
> > On 2020-03-31 Alberto Abrao wrote:
> >> Does anyone have any idea of what should I change on my end? That's
> >> weird.
> > Looking at your DKIM settings in your headers, I think I spotted the
> > problem.
> >
> > Alberto's:
> >   h=from:from:sender:reply-to:subject:subject:date:date:
> >   message-id:message-id:to:to:cc:mime-version:mime-version:
> >   content-type:content-type:content-transfer-encoding:
> >   in-reply-to:in-reply-to:references:references;
> >
> > Mine:
> >   h=Date:From:To:Cc:Subject:In-Reply-To:References;
> >
> > You are trying to protect too many headers, *especially* the ones that
> > mailman needs to change.  Also, the case on yours is not RFC (though
> > probably doesn't matter) and many headers are duplicated (weird!)
> > indicating a misconfiguration.
> >
> > Find your DKIM settings and try shortening your protected headers to a
> > list like mine (above).  And fix the case, and duplication.  Any header
> > not listed will not count in DKIM's hash of your email.
> >
> > Critically, I think you need to make sure you do NOT have "sender:"
> > protected, as mailman will always be adding/changing that header, and
> > that will throw off the hash and DKIM verification.
> >
> > MUUG's mailman may also play with the content-*.  That's why I'd stick
> > with a very small set of headers.  Spammers can't really make use of
> > those extra headers anyhow, so they don't need to be protected.
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