How do i delete all mail on my iphone 7

To delete all mail on your iPhone 7, you can follow these steps:

Method 1: Delete all emails from the Mail app

1. Open the Mail app on your iPhone 7.
2. Tap on the "Mailboxes" tab at the bottom of the screen.
3. Tap on the mailbox you want to delete all emails from (e.g. "Inbox", "Sent", "Trash", etc.).
4. Tap on the "Edit" button in the top-right corner of the screen.
5. Tap on the "Select All" button at the top of the screen.
6. Tap on the "Delete" button at the top of the screen.
7. Confirm that you want to delete all emails by tapping "Delete" again.

Method 2: Delete all emails from the Mail settings

1. Go to Settings > Mail, Contacts, Calendars.
2. Tap on the account you want to delete all emails from (e.g. "Gmail", "Yahoo", etc.).
3. Scroll down and tap on "Mail Days to Sync".
4. Set the number of days to 0 to delete all emails.
5. Tap on "Save" to save the changes.

Method 3: Delete all emails using iCloud

1. Go to Settings > [your name] > iCloud.
2. Tap on "iCloud Backup".
3. Tap on "Manage Storage".
4. Tap on "Mail" and then "Delete All".
5. Confirm that you want to delete all emails by tapping "Delete" again.

Note: Before deleting all emails, make sure you have backed up your iPhone 7 in case you need to recover any important emails.