POP3 POP3 AUTH PLAIN RFC1734 RFC4616 RFC5034 # # Server-side AUTH PLAIN REPLY AUTH + REPLY dXNlcgB1c2VyAHNlY3JldA== +OK Login successful From: me@somewhere To: fake@nowhere body -- yours sincerely # # Client-side pop3 POP3 plain authentication pop3://%HOSTIP:%POP3PORT/865 -u user:secret # # Verify data after the test has been "shot" CAPA AUTH PLAIN dXNlcgB1c2VyAHNlY3JldA== RETR 865 QUIT