POP3 SASL SASL AUTH DIGEST-MD5 SASL AUTH PLAIN SASL DOWNGRADE RFC1734 RFC2831 RFC5034 # # Server-side AUTH DIGEST-MD5 PLAIN REPLY "AUTH DIGEST-MD5" + Rubbish REPLY * -ERR AUTH exchange cancelled by client REPLY "AUTH PLAIN" + REPLY AHVzZXIAc2VjcmV0 +OK Login successful From: me@somewhere To: fake@nowhere body -- yours sincerely # # Client-side pop3 !SSPI Debug crypto POP3 DIGEST-MD5 authentication with SASL downgrade pop3://%HOSTIP:%POP3PORT/%TESTNUMBER -u user:secret # # Verify data after the test has been "shot" CAPA AUTH DIGEST-MD5 * AUTH PLAIN AHVzZXIAc2VjcmV0 RETR %TESTNUMBER QUIT