Hmm...I'm just looking at the code so it's hard to say if I understand it all, but it looks like if a user is receiving emails about the box being full then they should also get the "almost full" emails. But one thing I don't understand is that the code seems to use the user options field in the database to record whether or not they've been sent an "almost full" warning (I guess so that they don't get multiple warnings about it), but I don't see where the bit is ever cleared, so I'm wondering if it could be a bug that no one has noticed yet. ETA: ...but I have to admit that it seems more likely that I don't understand how it works.