There are 1 repository under xoauth2 topic.
This project is a very basic demo showing how to authenticate with OAUTH2 and send an email message for gmail, microsoft/office365 as well as hotmail.com/outlook.com/live.com email addresses.
XOAUTH2 mechanism plugin for cyrus-sasl
Solution to continue sending emails from PowerShell 5.1 script with "Modern Authentication" when Exchange online Basic Auth is disabled
Office 365 IMAP/POP3 OAuth
Modified version of PHPMailer