I just had this it stopped all emails last week. Went in and made sure it was on instant notification and hit ok, but still not sending. I'll look at my email but never had an issue with it. I know this is slow time of year for audio but not that slow lol.
Can you guys kindly check your spam folders please? The e-mails are going out just fine from the server, so there must be some delivery problem at some point. Let me know if you find anything - and if you do not, can you let me know what your e-mail provider is (gmail, hotmail, yahoo, custom)?
I have outlook and don't think my provider takes anything out unless it is dangerous or something then they sent me a notification. I have all my junk email and phishing. I still have nothing from diyma, the newest email of any kind is 1/26/2012 had over 10 that day which can be normal.