On Wed, 23 Sep 2020, Grant Taylor wrote:

On 9/23/20 11:46 AM, John Hardin wrote:
It doesn't believe the Message-ID was generated by Thunderbird. What's the message ID?

This piques my interest because I tell Thunderbird to use a custom Message-ID domain.

Where can I read more about what SpamAssassin thinks is and is not a Message-ID generated by Thunderbird? (Other than the source code.)

The rules are available in your local spamassasssin install, or in the public SVN under two places:

  https://svn.apache.org/viewvc/spamassassin/trunk/rules/
  https://svn.apache.org/viewvc/spamassassin/trunk/rulesrc/sandbox/

The Message-ID rule itself is this:

 header __MOZILLA_MSGID MESSAGEID =~ 
/^<(?:[a-f\d]{8}-(?:[a-f\d]{4}-){3}[a-f\d]{12}|[A-F\d]{8}\.[A-F1-9][A-F\d]{0,7})\@\S+>$/m

You'll need to be able to understand regular expressions to understand what it's looking for.


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