I'm having problem with the new mail notification sound on the default Mail App (Not gmail). Every time I get a new message I will get two notification sound. Looked everywhere for a setting but no luck. Any idea?
What type of email is it, Yahoo, Gmail, Facebook, ISP email?
On other threads, people have reported having an app for something like Yahoo installed, and it gives a notification as well as the Mail app. Look around to see if there are any of these installed.