Did you use mail subscriptions? I don’t remember seeing any legitimate mails being sent. Please speak up if you used this feature. Right now, all the spam bots are providing fake email addresses, so I have two problems, now: I need to undo changes made, and I need to unsubscribe fake emails; and I also keep getting failed delivery reports because emails are being sent to fake addresses.
Thus, for the moment there are no more mail subscriptions.