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On Thursday, October 8th, 2026 at 7:19 AM, Andrew C Aitchison
<[email protected]> wrote:
> On Thu, 8 Oct 2026, [email protected] wrote:
>
> >>>>> I got a spam from mout-xforward.gmx.net and was surprised that sending
> >>>>> IP was widely blacklisted including by Spamhaus. Is "mout-xforward" a
> >>>>> separate service that has a big outgoing spam problem?
> >>>>
> >>>> mout-xforward.gmx.net is used, if the user has a forwarding enabled and
> >>>> GMX has tagged the mail as SPAM.
> >>>
> >>> Forwarding to the user?
> >>> So, only GMX users should get mail from mout-xforward.gmx.net?
> >>
> >> No, forwarding from GMX users to external addresses.
> >
> > External address belonging to a GMX user?
> > Else I don't understand what forwarding is talked about.
>
> Whatever address (addresses?) the GMX user requested.
>
> I don't see how a spammer could use it to send bulk email,
> but some will come through the normal servers and thus have
> a better reputation.
>
> Were dkim and spf marked as from GMX or the original sender ?
DKIM marked for the original domain (not GMX), from header for the original
domain, envelope sender for gmx.net
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