Protocol for Sieve script exchange

    Please note that this document is not authoritative and may well be out
    of date; you should look at specs.html for the current authoritative
    document for the MANAGESIEVE protocol. Note: This is not a standards
    track protocol. If you decide to base a program upon it you have been
    warned. This is a simple text-based protocol for getting user sieve
    scripts onto the (presumably sealed) IMAP server. The requirements for
    this process are: 

      * the user must authenticate to gain access, preferably via a secure
        SASL mechanism. 
      * only valid sieve scripts may be accepted 

    Additional features provided: 

      * the ability to manage multiple scripts on the server with zero or
        one of them being the "active" sieve script 

Types

    This is a line-oriented protocol much like [IMAP] or [ACAP]. There are
    two types: ATOMS and strings, all space ('SP') separated. Strings may
    be quoted or literal. See [ACAP] for detailed descriptions. 
    sievename is a string where only certain characters are allowed and it
    must be at least 1 character long. 

Commands

    AUTHENTICATE SP string [SP string] EOL 
            SASL authentication; the parameters are the mechanism and
            optionally the initial data. Initial data is base64 encoded.
            The server replies with an OK or NO response, or a base64
            string followed by an EOL. Client then replies with a base64
            string followed by an EOL, and the procedure is repeated. 
    NOOP EOL 
            No side effects. Valid replies: OK or NO. 
    LOGOUT EOL 
            Logout: terminates connection. Valid replies: OK or NO. 
    GETSCRIPT SP sievename EOL 
            The parameter is the name of the requested script. Returns:
            string EOL containing the script data. Get the script with name
            sievename from the server. Valid replies: OK or NO. 
    PUTSCRIPT SP sievename SP string EOL 
            Puts sievename with data data onto the server if possible.
            Valid replies: OK or NO. 
    SETACTIVE SP sievename EOL 
            Set the script with the name sievename as the active script.
            Any other script that was active is no longer. Valid replies:
            OK or NO. 
    DELETESCRIPT SP sievename EOL 
            Delete the script with sievename. Valid replies: OK or NO. 
    LISTSCRIPTS EOL 
            Returns zero or more: sievename EOL. Where the active script
            has a '*' at the end of its name. Valid replies: OK or NO.