you can do this with spamassassin and procmail
----- Original Message -----
From: "Steven Buehler" <steven@sanctuaryweb.org>
To: <slug@nks.net>
Sent: Sunday, August 10, 2003 20:46
Subject: Re: [SLUG] Filtering KMAIL email to Delete Without Using POP
Filters
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> There is a product out for Windoze (wish they'd do it for Linux if they
> haven't already) that has a "white list" type approach. When a user sends
> someone running the software a first email, the software replies back to
the
> sender requesting an authentication key (the same way that majordomo does
for
> the SLUG list). If a correct key is returned, the user is added to the
> whitelist; if not, the user will continue to be rejected until the correct
> authentication key is received.
>
> SWB
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> iD8DBQE/Nud+rJKzI7b6/nkRAvjVAJ48M60p3V+zzE4CW22rH/tfaM1EfgCgyLPm
> XO2fGkG8xYL2tl5dyuxIMQU=
> =8OVn
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>
>
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