I just moved from 1.8.4+ to 1.9+ (20080308). I had an instructor post to his forum and EVERYONE in the system received an email about the forum post – not just the students currently enrolled in his class. And I received Failed Delivery notifications on all of them!

His forum was set to forced subscriptions, but that should only be for those enrolled in his course. I turned force subscriptions off in that forum but I am worried that other courses have forced subscriptions as well.

I just sent another test message in a closed site with no students assigned and it is doing the same thing.

There are no students assigned at the system level.