When all the members of the old phpbb forum were moved to the new forum, all pm notifications were not enabled by default. Since a lot of users were too lazy to turn on PM notification in your own profile settings, I went ahead and turned them on for everyone with a mass edit. I think PM notification by email and pop up is important. Now if you really don't want it on you can go back in your settings and turn it off.

While I was in there, I also turned on everyone's email notification for replys to threads you are subscribed to. Now this setting I know more of you will turn off because you might get too many emails. Especially those of you that read every post anyway.So go ahead and turn notification back off if you wish.