How to Upgrade to OAuth2 Security for Existing Yahoo Accounts


Yahoo IMAP and SMTP servers support authorization via the OAuth 2.0 protocol, which Postbox also supports. If you're receiving notifications about using a less secure application, or simply want to use the latest and greatest security protocol, try upgrading your Postbox Yahoo account to OAuth2. It's quick and easy to do!

Note: These instructions are only for Yahoo accounts that have already been set up within Postbox. If you are setting up a new Yahoo account, simply walk through our New Email Account Wizard and the correct settings will be configured for you.

  1. Within Postbox, navigate to Options | Preferences > Security > Passwords > Saved Passwords and click the "Show Passwords" button.
  2. Take a screenshot of your passwords, so you have them as a backup.
  3. Remove all of your Yahoo passwords from the Password Manager, then close the window.
  4. Navigate to Options | Preferences > Accounts. Select your Yahoo account and change Authentication to "OAuth2 (Yahoo)." 
  5. Next, Navigate to Options | Preferences > Accounts > Outgoing Servers (bottom of the list on the left). Here you will want to edit the Yahoo server and change Authentication to "OAuth2 (Yahoo)."
  6. Once complete, restart Postbox, and it will authenticate.

Happy Emailing!

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