Our users are moderated on subscribing, and then unmoderated after a probation period. Some are moderated again for bad behaviour, then unmoderated for a period, then moderated again, etc.
In making decisions about who to unmoderate, it would be useful to see the user's history. I.e. when they subscribed, when they were unmoderated, etc. At the moment we can't even tell why someone is moderated, and the only history I've got is the subscription alert emails I save.
On top of that we have many users who unsubscribe instead of turning off mail delivery when they go on holidays, so they become moderated again when they resubscribe.
Does mailman keep a record of this stuff?