Re: Fw: Undelivered Mail Returned to Sender

[chloros]

On Fri, 2020-07-10 at 17:38 +0200, Markus Mützel wrote:
> Am 10. Juli 2020 um 17:34 Uhr schrieb "chloros":
> > Hi Markus,
> >
> > the same thing happened to me on wednesday when I replied to one of
> > the
> > jsondecode emails. I got the same error:
> >
> > DreamHost Email Support
> > <octave-maintainers@gnu.org> (expanded from <maintainers@octave.org
> > >):
> > host eggs.gnu.org[209.51.188.92] said: 550-[SPF] 64.90.62.163 is
> > not
> > allowed to send mail from gmx.de.
> >
> > Yet another gmx feature ...
> >
> > Best regards
> >
>
> I'm not sure this is gmx's fault in this case. I don't think they can
> do anything if the gnu server bounces the message that dreamhost
> forwards...
>
> Markus
>


Hi Markus,

when i search for 'SPF', i get hits that display "Anti-Spam". That
already rings like a bell in my ears. I don't know exactly either, but
what i understand is, that the recipient's mail server (eggs.gnu.org)
comes to the conclusion that the sender IP is not authorized to send
emails for the domain 'gmx.de', according to the SPF record. But then
the SPF record for gmx could be broken.

For example if i check online for 'gmx.de':
SPF Authentication: SPF Failed for IP - 64.90.62.163

Best regards