POP3 SASL SASL AUTH PLAIN SASL-IR RFC1734 RFC4616 RFC5034 # # Server-side AUTH PLAIN REPLY AUTH +OK Login successful From: me@somewhere To: fake@nowhere body -- yours sincerely # # Client-side pop3 POP3 plain authentication with initial response pop3://%HOSTIP:%POP3PORT/871 -u user:secret --sasl-ir # # Verify data after the test has been "shot" CAPA AUTH PLAIN dXNlcgB1c2VyAHNlY3JldA== RETR 871 QUIT