even some months ago for many with a certain type of anti-spam software the emails would not get through as the 'sender' of these emails couldn't be verified (basically they moved the MB to a new server but still left traces of the old system around) - rather than try to fix this problem I think the email notification was turned off (I may be wrong here as I complained about the non-delivery problem for a bit until finally getting a technical answer from my ISP but I havn't seen any sign of attempted delivery for some months)