DKIM test

[Sandro Santilli]

On Thu, Jul 10, 2025 at 04:08:22PM -0400, Regina Obe wrote:
> 
> Replying without cc'ing you.

Ok it looks like Mailman will ONLY rewrite the From IFF a DMARC
policy is found for the sender domain. Mine has a policy of "reject":

  dig -t TXT _dmarc.kbt.io

Yours doesn't have any:

  dig -t TXT _dmarc.pcorp.us

For this reason Mailman does not strip your From and DKIM signature
while does it for my messages, which are then signed by OSGeo itself.

In any case the DKIM signature on your mail was valid when it arrived
to me. But on an older message it was not, and I cannot see why:

  Message-ID: <000401dbef45$14943240$3dbc96c0$@pcorp.us>
  Authentication-Results: hst.kbt.io; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=pcorp.us header.i=@pcorp.us header.a=rsa-sha256 header.s=google header.b=pgllgDSW; dkim-atps=neutral

--strk; 

  Libre GIS consultant/developer 🎺
  https://strk.kbt.io/services.html
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