Folks,

I hope this is not too off-topic, but I figure this is the best mailing list because we're probably not in this boat alone, wherein we're annoyed (very) and a bit helpless about Google. I have to ask here, because Google of course doesn't care about us.

We operate several postfix mailservers with hundreds of users, and the rate at which these users find their emails spamfiled on the side of Gmail recipients is increasing.

And yet, we're doing everything we can! SPF is configured, DMARC is configured, DKIM works. And we've even registered the domains and MXs with Google's Postmaster services, https://postmaster.google.com/.

And yet, most mails are filed as spam on their side. And we just cannot figure out why. I promise we're not writing about enlargements or crypto scams. We use proper English (or German), and we know how to capitalise words.

Looking at messages being classified, there is nothing in the headers that gives any clues. In fact, the headers look just fine:

 Authentication-Results: mx.google.com; dkim=pass (test mode)
   header.i=@example.org header.s=2015-11-14 header.b=T7jbyqDv;
   spf=pass (google.com: best guess record for domain of
   madd...@example.org designates 2001:db8:bad::cafe:: as
   permitted sender) smtp.mailfrom=madd...@example.org;
   dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=example.org

What else can we do? How do you deal with this problem?

--
@martinkrafft | https://riot.im/app/#/room/#madduck:madduck.net

"for art to exist, for any sort of aesthetic activity or perception to
exist, a certain physiological precondition is indispensable:
intoxication."
                                             -- friedrich nietzsche

spamtraps: madduck.bo...@madduck.net

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