Hi Florian, Do you have this information posted anywhere online such as in a blog post or support article?
The information shared in this mailing list is a little disjointed and difficult to follow, so having an article that we can reference that includes the precise requirements you're establishing, and examples would be very helpful. Also, do you have a date for when you are going to begin enforcing this new policy? Thanks, Matt Gilbert - Deliverability Engineer - Mailchimp > On Apr 6, 2021, at 5:36 AM, Florian.Kunkel--- via mailop <mailop@mailop.org> > wrote: > > ! > * to all those sending email without their very own static IP-Address, > * and all newly set up MTA infrastructure > ... especially ESPs using IP pools professionally for their numerous > customers' mail. > ! > > As you might already have observed we are evaluating DKIM signatures > @t-online.de for a while now. > We are starting to expect aforementioned IP infrastructure to have all > messages DKIM signed conforming DMARC, so header from and mail from must be > aligned. > unsigned messages, unaligned or messages failing validation otherwise, will > be rejected while in SMTP session. > > worst come first > Expect this procedure to hit you the earlier, the more traffic we are already > used to reject from your infrastructure. > > Do not expect DMARC reports anytime soon. > Equally we won't check for DMARC policies at the moment; ... but p=reject > could become an option. > > > Cheers > > Florian > E-Mail Engineering > > Deutsche Telekom AG > Deutsche-Telekom-Allee 9, 64295 Darmstadt, Germany > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop
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