Re: Undelivered Mail Returned to Sender

> > From the results of a reverse lookup on that address, I'd guess
> > that the IP in the error message belongs to dreamhost:
> > PS > nslookup.exe 64.90.62.163
> > Name:    mx1.dreamhost.com
> > Address:  64.90.62.163
> >
> > That's why I'd think it is ok that SPF says that no messages from
> > the gmx.de domain should be sent from that IP. And hence, it is
> > probably ok for gnu.org to reject that message.
> >
> > Instead, dreamhost should probably adapt the sender in the header:
> > https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme
> >

Yes, you are right!