Can you empty trash can on iphone 4s email account

[bookmind]

I have 3 email accounts on my phone and it shows a large amount of deleted emails how do I empty the trash can?

 

[ardchoille]

I also have three email accounts on my devices. Here is how you delete mail in the trashcan:
1. At the top of the screen tap "Mailboxes"
2. In the Accounts section tap an email account
3. In that email account, tap on Trash
4. In the Trash window, tap the Edit button in the top right of the window

Now you can either delete items individually or tap the Delete All button in the lower left of the window to delete them all at one time.