Answer
After selecting the email account, navigate to the right-side panel and uncheck the Enable this account checkbox under the Account Information section. If you wish to sign out from your iMessage account, choose iMessage from the left-side panel and click the “Sign Out” button at the right side of the panel.
How to Sign Out of Mail on Mac
How to Sign Off Mail on Mac
Select “Account” from the drop-down menu. Locate your profile image in the upper right corner of the screen and double-click on it to open a new menu. To access a dropdown menu, click on your personal picture. Steven John/Business Insider
Your browser may have incognito or guest browsing settings, which might be enabled. If that’s the case, you can sign in to your account by using that option to log out safely and undetectably.
On an iPhone, iPad, or iPod touch: Open the Settings app. Go to your “iCloud ID” or name and log in. Select “Sign Out” from the bottom of the screen. Your device has been disassociated with all iCloud services, including Mail, iTunes, Apple Pay, iCloud Photo and Data Sharing, and Shared Notes to mention a few.
On a computer, go to Gmail and scroll all the way down to the bottom of your inbox. You should see tiny print that says “Last account activity.” Right below it, click the “Details” button. To log out of Gmail from computers in other locations remotely, press the “sign out all other web sessions” button.
“Click here to go back to the previous page.” If you’re using a different device, for example, a laptop, open Chrome and go to the top right corner of the screen. Select ‘Manage Your Google Account’ from there. The ‘Security’ tab should be selected. nScroll down until you get to ‘Your Devices.’ Sign out of any devices that you don’t want to use anymore by going down to ‘Manage Devices,’ then signing out there.”