Spam detection software intercepting ArduPilot Discourse Summary emails

The last two ArduPilot Discourse Summary emails to me have been intercepted by spam detection software, running on the system “moin”, and flagged as spam.

I have no idea what the system “moin” is, nor why the emails have been flagged.

In fact, the intercepting email looks like spam more than the ArduPilot Discourse Summary email does. The whole thing looks dodgy to me.

Has anyone else experienced this?

Should I just ignore the intrusion?

How do I make it (moin) stop getting in the way?

Here is the offending email:

[__ SPAM 4.0 __] [ArduPilot Discourse] Summary.pdf|attachment (71.9 KB)

Your email host/provider is running Spam Assassin software, which flagged the email. Contact the sysadmin to whitelist our domain (or use an email service over which you have more control).

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My email host/provider is gmail and my ISP is Aussie Broadband. According to a Google search using AI mode, neither of those organisations use Spam Assassin. This intrusion has only started in the last couple of weeks, so I wonder where it is coming from? Maybe from ardupilot.org’s provider?

Weird …

It looks dodgy, but it’s happening downstream from our domain as far as I can see. I receive ardupilot.org emails via Gmail without issue.

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It could be connected to a German crook because the word ‘ Moin ‘ is also a german slang word for - good morning -. Just my thoughts.

Received: by moin.ardupilot.org (Postfix, from userid 2001) id C4F6440032; Wed, 26 Nov 2025 09:18:28 +0000 (UTC)
Received: from localhost by moin with SpamAssassin (version 3.4.6); Wed, 26 Nov 2025 09:18:28 +0000

moin.ardupilot.org is responsible for this filtering, per the email headers.

Edit: And it seems that from the contents of the email, it’s only being flagged because queries to various blocklists are failing, causing an automatic flagging, I think.

@Joshua_Kordani, much appreciated! I do not have access to the level of infrastructure required to see that configuration, and I do not receive these particular email updates, so I made an invalid assumption. I’ll pass this on. Thanks again.

I can send you the full email (or forward it to whomever). Just set me loose!

I have notified the folks who can take action. Thank you!

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