Remove email hosting for any domain you have added, if email hosting is in enabled state (Click on the dark mail icon in the domain). When you remove email hosting and delete the domain, all the domain based aliases and email addresses are removed from the account. Delete the domain.
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How to Permanently Delete Your Yahoo Mail Account
4. In the popping out Account Settings dialog box, (1) click the Email tab; (2) click to select the email account you will remove; (3) click the Remove button. See screenshot: 5. Click the Yes button in the coming Microsoft Outlook dialog box. 6. Close the Account Setting dialog box, Mail Setup dialog box, and All Control Panel Items dialog box Delete specific Google services or your Google Account Delete specific Google services or your Google Account If you're no longer interested in using specific Google services, like Gmail or YouTube, you can sign in to your Google Account to delete them. You can even delete your entire account and all your data, like emails and photos.
Feb 05, 2020
Learn what deleting your account means: You’ll lose all the data and content in that account, like … How to Permanently Delete Your Yahoo Mail Account