Emulate "Less Secure Apps" with Email OAuth 2.0 Proxy

Email OAuth 2.0 Proxy is a local IMAP/POP/SMTP proxy that adds OAuth 2.0 authentication transparently, allowing email clients that don't support OAuth to keep working unchanged. From the README:

"Email services that support IMAP, POP and/or SMTP access are increasingly requiring the use of OAuth 2.0 to authenticate connections, but not all clients support this method. This tool is a local proxy that intercepts the traditional IMAP/POP/SMTP authentication commands and transparently replaces them with the appropriate SASL (X)OAuth 2.0 commands and credentials. Your email client, app or device can continue to use the login or auth/authenticate options, with no need to make it aware of OAuth's existence. The proxy works in the background with a menu bar/taskbar helper or as a headless system service, and is compatible with macOS, Windows and Linux. It can be used with any email provider that supports OAuth 2.0 authentication, including Outlook, Office 365, Hotmail, 21Vianet, Gmail, Google Workspace, Fastmail, Yahoo, Comcast, AOL and many others."

❧ 2026-01-06