How logout mail in mail.app

To log out of your email account in Mail.app on a Mac, follow these steps:

1. Open Mail.app
2. Click on the "Mail" menu at the top of the screen
3. Select "Preferences" from the dropdown menu
4. Click on the "Accounts" tab
5. Select the account you want to log out of from the list of accounts on the left side of the window
6. Click the "Edit" button next to the account
7. Uncheck the box next to "Use this account"
8. Click "OK" to save the changes

Alternatively, you can also log out of your email account by clicking on the "Log Out" button at the bottom of the Mail.app window, next to the "Quit" button.

Note: If you're using a iCloud account, you may need to sign out of iCloud on your Mac as well to completely log out of your email account. To do this, go to System Preferences > iCloud, select the account you want to log out of, and click the "Sign Out" button.