Do Gordano Products support RFC 1734?
RFC 1734 is on the standards track and while not a standard, will be soon. This RFC deals with POP3 AUTHentication command.
Both POP3 and IMAP4 support this standards track RFC and are therefore RFC compliant.
This RFC covers the optional AUTH command, for indicating an authentication mechanism to the server, performing an authentication protocol exchange, and optionally negotiating a protection mechanism for subsequent protocol interactions. The authentication and protection mechanisms used by the POP3 AUTH command are those used by IMAP4.
The AUTH command indicates an authentication mechanism to the server. If the server supports the requested authentication mechanism, it performs an authentication protocol exchange to authenticate and identify the user. Optionally, it also negotiates a protection mechanism for subsequent protocol interactions.
A protection mechanism provides integrity and privacy protection to the protocol session. If a protection mechanism is negotiated, it is applied to all subsequent data sent over the connection. The protection mechanism takes effect immediately following the CRLF that concludes the authentication exchange for the client, and the CRLF of the positive response for the server. Once the protection mechanism is in effect, the stream of command and response octets is processed into buffers of ciphertext. Each buffer is transferred over the connection as a stream of octets prepended with a four octet field in network byte order that represents the length of the following data. The maximum ciphertext buffer length is defined by the protection mechanism.
If an AUTH command fails with a negative response, the session remains in the AUTHORIZATION state and client may try another authentication mechanism by issuing another AUTH command, or may attempt to authenticate by using the USER/PASS or APOP commands. In other words, the client may request authentication types in decreasing order of preference, with the USER/PASS or APOP command as a last resort.
Should the client successfully complete the authentication exchange, the POP3 server issues a positive response and the POP3 session enters the TRANSACTION state.