Hey!

On Mailman3, every "message held" notification has "XXX" as the reason. This comes from the HoldChain class in mailman/chains/hold.py, where "XXX" is hardcoded. I'd like to fix that. I think there could be a list in the message metadata to which each matching rule would add a short description of why it matched, like we currently have a list of matching rules in the msgdata['rule_hits'] variable. I'll make sure to mark these descriptions as i18n strings.

Are you OK with that? Any trap I'm not seeing?

Aurélien