To send and receive email using the Mail app > Apps > Mail.
Tap Mail Accounts, tap the email account you want to turn off, then do one of the following:
Turn off an iCloud email account: Tap iCloud, then turn off iCloud Mail.
Turn off another email account: Turn off Mail.
Tip: You can choose if you want to continue using other apps with this account—including Contacts, Calendars, and Reminders. Turn each individual app on or off.
You can remove an email account from the Mail app and from all the apps that use it on your iPad.
Note: This action doesn’t cancel the email account; it just removes it from your iPad. To close the account completely, visit your email account provider.
Go to Settings Move apps and widgets around.