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
imap server proxying access to another imap server with oauth2 authentication
Modified version of PHPMailer
Office 365 IMAP/POP3 OAuth
Scripts to create an Entra ID application with permissions and service principals and to retrieve and update the XOAuth2 token from Microsoft.