To remove an email account from your iPhone Mail app, follow this basic procedure:

STEP 1.  ​Open Settings

STEP 2.  Now open the ​Mail​ category

Note: In earlier versions of iOS, this category may be called ​Mail, Contacts, Calendars

STEP 3.  Tap ​Accounts​ & Passwords

STEP 4.  Select the email account you wish to remove under ​ACCOUNTS​

STEP 5.  Tap ​Delete Account at the very bottom

STEP 6.  Confirm by tapping ​Delete Account again

Will Deleting an Email Account Remove All the Emails from the iPhone?

​Yes, the emails will be deleted along with the account.

​​That means you can no longer see messages in the Mail app. The messages may not be wiped physically from the phone immediately, though, so it might be possible to recover a portion using forensic data recovery.

Will Deleting an Email Account from the iPhone Delete the Account Itself?

No, your email account and address will remain unchanged.

You can still receive and send emails on the web (even your iPhone’s favored browser) or in other email programs set up to use the email account.

Will Deleting an Email Account Delete the Emails from the Server?

​No, for IMAP and Exchange accounts nothing will change on the server or in any other email program set up to access the same account.

​For POP accounts, nothing changes either. Do remember, though, that the iPhone could be the only place where these emails are stored. This is the case when iOS Mail is set up to delete emails from the server after downloading them and the same message have not been saved anywhere else before.

What if I Still Want to Be Able to Send Emails Using the Account’s Email Address?

It is not necessary to have an email account set up on an iPhone to send messages using its address in the From: line.

Instead, you can add the address as an alias to an account you do use on the iPhone:

STEP 1.  Open Settings

STEP 2.  Now open the Mail category

STEP 3.  Select Accounts

STEP 4.  Tap ​Email​ under POP ACCOUNT INFORMATION

STEP 5.  Now tap ​Add Another Email…​

STEP 6.  Enter the email address you want to use for sending

STEP 7.  Tap Return

STEP 8.  Now select the account’s name at the top

STEP 9.  Tap ​Done​

Note: this will only work with vanilla IMAP and POP accounts. With Exchange accounts and those using the Gmail, Yahoo! Mail and other account types with automatic settings, adding alias addresses for sending is not possible on the iPhone.

You may be able to send from addresses if you add them to the respective service for sending using their web interface, though. If you add an alias address to an Outlook.com account, for instance, it would be available for use in iOS Mail for sending as well—and automatically.

​Can I Also Disable an Email Account Instead of Deleting It?

​Yes, you need not delete an email account from the iPhone entirely to remove or hide emails.

​To turn off an email account on iPhone (while still being able to access the same account’s calendar, for example):

STEP 1.  ​Open ​Settings​

STEP 2.  Go to the ​Mail​ category

STEP 3.  Tap ​Accounts​

STEP 4.  Now tap the email account you want to disable under ​ACCOUNTS​

STEP 5.  Make sure ​Mail​ is turned off for IMAP and Exchange accounts.Note: For POP email accounts, make sure ​Account​ is turned off on the same page

STEP 6.  Tap ​Done​.

How about Just Turning off Notifications (and Still Receive Emails)?

Of course, you could also disable automatic mail checking or notifications for the account. Then, you can still receive and send messages from the account, but it remains hidden from obvious sight and conveniently out of the way.

To turn off automatic mail check for an account on an iPhone:

STEP 1.  Open Settings

STEP 2.  Go to the Mail category

STEP 3.  Select Accounts

STEP 4.  Open Fetch New Data

STEP 5.  Now tap the desired email account

STEP 6.  Make sure Manual is selected under SELECT SCHEDULE

To disable only notifications for new messages you receive at an iPhone email account (while the messages are still downloaded automatically and ready once you open Mail):

STEP 1.  Open ​Settings​

STEP 2.  Go to the ​Notifications​ category

STEP 3.  Select ​Mail​

STEP 4.  Now select the account for which you want to disable new mail notifications

STEP 5.  Make sure None is selected under ​ALERT STYLE WHEN UNLOCKED

STEP 6.  Now make sure ​Show in Notification Center and ​Show on Lock Screen are both turned off

STEP 7.  Optionally, you can also disable ​Badge App Icon.Note: If you keep this on, Mail will add the number of unread emails in the account’s inbox to its icon’s count on the Home screen

To hide an account’s inbox from the top of Mail’s Mailboxes screen:

STEP 1.  Open Mail

STEP 2.  Swipe left to go to the Mailboxes screen

STEP 3.  Tap Edit

STEP 4.  Make sure the account is off in the top section.Tip: You can also move an inbox or account further down by grabbing the three bar icon (≡) next to it

Note: To open an account’s inbox at any time, tap Inbox under its name on the Mailboxes screen