On 2018-02-27 21:17, Philip Paeps wrote:
You're posting as an alias in a domain from a server that's not
authorized to send mail for that domain and isn't dkim signing for
that domain, and posting to a public group in that domain. It's kind
of a spammy set of circumstances, but really it's the not great ipv6
address with no auth that does it.
When this particular domain moved to GSuites, we talked (at length)
about making sure those of us who run our own mailservers could still
use it. Turns out spf and dkim were never actually set up though.
I will chase that down.
Thanks again for helping debug this.
Don't forget to make sure that the G Suite side is also DKIM signing and
that you've published these records properly.
(You probably know this, but I've seen so many clients screw it up that
it is worth repeating... And re-checking that some eager-beaver DNS
admin doesn't remove your older DKIM records when they add a new one).
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