We're not seeing that error in our mail server logs here in Canada.
The trend seems to be that mail servers worldwide have gradually
been adding DKIM signing to all outbound mail, and some are starting
to require it of all inbound mail (we're also considering making DKIM
signing a requirement for all inbound mail).
Feel free to ask if you have any questions about getting these
things set up -- the SPF and DMARC part is very easy, and the DKIM
part takes a bit of work that's well worth the effort.
Getting everything configured and tested over a few days or a
weekend is a realistic possibility (depending on the size and
complexity of your system, of course), and could be a nice gift for
your users if it's working before Christmas.
> Hello all,
>
> do any of you who do not live in Germany have this error message from
> GMX and WEB.DE? Or is this an educational measure for German providers only?
>
> 451-Requested action aborted\n451-Reject due to policy
> restrictions.\n451 For explanation visit https://postmaster.gmx.net/de/
> https://postmaster.gmx.net/en/case?c=r0103
>
> Hundreds of domains go through our servers, should we now explain to
> every customer that if they, as German citizens, want to send an e-mail
> to other German citizens, especially if they live with Web or GMX.de,
> they must first populate their domains with DKIM entries? Cool thing,
> especially so close to Christmas.
>
> Kind regards
> Andreas
>
>
--
Postmaster - postmas...@inter-corporate.com
Randolf Richardson - rand...@inter-corporate.com
Inter-Corporate Computer & Network Services, Inc.
Vancouver, British Columbia, Canada
https://www.inter-corporate.com/
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