Ultimately the signed messages get screwed up by the mailing list.

The headers make that pretty clear and spamassassin marks the message ‘X-Spam: Yes’ when further below you see another instance validate the original receipt.

Would recommend disable the DKIM check in spamassassin on the mailing list or strip DKIM headers before wrapping and relaying the messages to the list.  https://wiki.list.org/DEV/DKIM

I’m sure more lives are enriched by filing anything by me as spam than otherwise. 🤷♂️

From: Roundtable <roundtable-bounces@muug.ca> On Behalf Of Sean Cody
Sent: April 2, 2020 11:03 PM
To: 'Continuation of Round Table discussion' <roundtable@muug.ca>
Subject: Re: [RndTbl] Gmail spam filtering super-aggressive lately

You are probably better for it.

From: Roundtable <roundtable-bounces@muug.ca> On Behalf Of Hartmut W Sager
Sent: April 2, 2020 12:38 AM
To: MUUG - Round Table <roundtable@muug.ca>
Subject: Re: [RndTbl] Gmail spam filtering super-aggressive lately

Sean Cody's two postings late last evening also went to my Gmail spam, so Alberto, you've got company!  :)

Hartmut W Sager - Tel +1-204-339-8331