If you do not wish to collect email on your iPad or iPhone - This is how to remove an email account

Apple Tips

1. Go to Settings
 Settings

2. Select Mail
Mail

3. Select Accounts
Accounts

4. Select the Account you wish to remove
mail account

5. Tap Delete Account
delete account

6. Tap Delete from my iPhone / iPad
delete from my iPhone

You may need to wait a little while as it removes your account