Once I've activated this feature with my BSNL SIM. I used to get each and every SMS notification for mail and enjoyed this feature for a maximum one week. After a week I turned off this feature due to two reasons. First one is, I was getting more than 30 SPAM mails a day, which you know useless and more than my important mails. Due to which this irritated me by the beep sound in every 10-15 min. Second reason is, within a week my mail box filled and I was unable to get important and normal messages to my mobile. This is the situation.
However, in Android mobile there are several features to keep excess messages, avoid SPAM messages, and received SMS alert for Facebook, Gmail and other social networking accounts. However, you need to consult your mobile service provider regarding this feature if you want to activate.
'Every bad situation will have something positive. Even a dead clock shows correct time twice a day.'