I just reactivated myself on the list after getting this notification
Your membership in the mailing list MediaWiki-l has been disabled due to excessive bounces The last bounce received from you was dated 11-Jun-2019. You will not get any more messages from this list until you re-enable your membership. You will receive 3 more reminders like this before your membership in the list is deleted.
I’m trying to figure out what was bouncing and why, since I use a gmail account and I don’t think it’s set to send bounce messages.