Prevent double notifications for an email My Email app seems to notify me about new email from Gmail. However, I use Gmail app with my Gmail account too. In the end, I always got 2 notifications for 1 email.

How can I make the Email app to not notify me? (I prefer Gmail app)
You cannot uninstall Email as it's a system app.
Either disable Gmail or Email from Settings->Apps->All .

Or root your phone and then uninstall it using apps like System App Remover

If you can't do either of the above two, just somehow try to logout from either Gmail or Email so as to avoid double mails.
Or if you just don't want those notications alone, go to App Info of that app from Settings->Apps->All and untick the Notifications check box.

No other way other than these :)