Re: Fw: Undelivered Mail Returned to Sender

[Przemek Klosowski]

On 7/10/20 11:34 AM, chloros wrote:
> 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 ...


So typically what happens is that either an email listserver or 
someone's forwarding results in an email that claims to be from you but 
actually coming from gmx. The email headers specify SPF checks, and the 
gnu.org MTA obediently verifies them and balks. That's why modern 
listservers say things like From: listserver.us on behalf of 
jane@doe.com--the SPF is correct wrt. the actual sender, and yet you can 
still see who actually originated the email.