Yeah, when I tried joining subsim I had problems; firstly with usernames being taken and then because I was trying to use a hotmail account - took me ages to realise that the previous dozen names I tried had been ok and that it was hotmail that was now the issue! Ended up using my work email, and only just turned off instant notifications, after a weekend I'd open Outlook and there'd be about 70 notifications from subsim!
Obviously they took priority over work emails!