Office365 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 Office365 account to OAuth2. It's quick and easy to do!
Note: These instructions are only for Office365 accounts that have already been set up within Postbox. If you are setting up a new Office365 account, simply walk through our New Account Wizard, and the correct settings will be configured for you.
- Within Postbox, navigate to Options | Preferences > Privacy and then select the checkbox for "Accept cookies from sites."
- Navigate to Options | Preferences > Security > Passwords > Saved Passwords and click the "Show Passwords" button. Take a screenshot of your passwords so you have them as a backup.
- Remove all of your Office365 passwords from the Password Manager, then close the window.
- Navigate to Options | Preferences > Accounts. Select the Office365 account and change Authentication to "OAuth2 (Office365)." Repeat this step for each of your Office365 accounts.
- Navigate to Options | Preferences > Accounts > List on the Left > Outgoing Servers. Here you will want to edit each Office365 server and change Authentication to "OAuth2 (Office365)."
- Once complete, restart Postbox, and it will authenticate with each of your Office365 accounts.