To delete an email from a Gmail account is very simple. You can easily delete your Gmail account with the help of very simple steps. Here are the steps you have to follow. One thing to keep in mind is that gmail deletes old emails not executed itself. Just follow these steps:
Login your Gmail account
Then click on the square box and select the emails that you want to delete
You can also click on select all
Once the emails is selected you have to click on delete option
Then conform