On your Mac, the default email client is Mail, and this allows you to send and receive Mail from your multiple email providers. You just have to login to the email provider or set up the IMAP so that you can connect your email provider to Mail. Mail allows you to add multiple accounts so that you don’t have to download individual apps or go to a browser just to read your messages.
If you have added multiple accounts, then chances are that you don’t use a lot of them and the messages are just there taking up space in your inbox. If you no longer want to keep this email address here, you can remove it from Mail. You may have logged in your account on another Mac and you don’t want to leave your details there – the best practice is to sign out.
Mail allows you to sign out but not in the way you may think. To sign out, you’ll have to remove the account from your Mac – there’s no in-app setting that allows you to sign out by selecting a button.
Log Out of Mail on Mac
When you remove a mail account on your Mac, all of the messages will be removed, and you’ll no longer be able to see them.
1. Open the Mail app.
2. Choose Mail > Preferences > Accounts.
3. Select the account you want to use.
4. Select Remove.
Note: If you’ve used this email account with other apps on your Mac, you’ll have to take a few more steps to remove it. You’ll be asked to remove the account in Internet Accounts System Preferences. When you remove your mail account, select the button to open Internet Account and uncheck the Mail tick box for the account.