How do you undelete deleted mails in my Gmail account?

1. Go to settings
2. Go to Accounts and Imports
3. Then click google Account Settings
4. Next to My Products click edit
5. Than click Close accounts and delete all services and info associated with it.
6. Fill out the information needed

You can delete you Gmail account by Going to google, Clicking on "Account Settings", Then Clicking on "Edit Services" and then Selecting, "Delete my account and all services associated with it".