POP3 SASL SASL AUTH OAUTH2 RFC1734 RFC5034 RFC6749 # # Server-side AUTH XOAUTH2 REPLY AUTH + REPLY dXNlcj11c2VyAWF1dGg9QmVhcmVyIG1GXzkuQjVmLTQuMUpxTQEB +OK Login successful From: me@somewhere To: fake@nowhere body -- yours sincerely # # Client-side pop3 POP3 OAuth 2.0 authentication pop3://%HOSTIP:%POP3PORT/870 -u user --oauth2-bearer mF_9.B5f-4.1JqM # # Verify data after the test has been "shot" CAPA AUTH XOAUTH2 dXNlcj11c2VyAWF1dGg9QmVhcmVyIG1GXzkuQjVmLTQuMUpxTQEB RETR 870 QUIT