zedshaw
Reject emails whose subject is "unsubscribe"
If a person sends an email trying to unsubscribe, Librelist currently passes it on to the entire list. Code should be added to the POSTING handler to detect messages whose subject lines consist only of the word "unsubscribe."
The most useful thing to do with such messages is to trigger an unsubscribe confirmation, as with listname-unsubscribe emails. (This may use a different template, with a notice reminding people that the official way to unsubscribe is to use listname-unsubscribe, and that if the message is legitimate, they probably shouldn't have "unsubscribe" as the only word in the subject line.)
I would be happy to implement this myself, once there are instructions for setting up a development/testing environment.