Mail Auth Daemon! how!

[Dead Line]

Hello list.

    We are doing a Mail Server using FreeBSD 4.8-R,
    I succeed to install many web clients, such SquirrelMail, sqwebmail, 
nocc
    and all it goes fine, when i try to logon to any login interface, it 
always says incorrect user/pass

    So, i relized (and someone said) that i should have an Auth daemon, to 
pass this user/pass
    to the system.

    I cannot find something called authdaemon to install, also CRAM-MD5 what 
is it? how to run it?

    please any detailed advise will be appreciate it. we are  stuck here :-(



    thanks a much
    Marwan

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