Re: How do fix a good solution against spam..

From: Cyrille Lefevre (clefevre-lists_at_9online.fr)
Date: 05/15/04

  • Next message: Anton Alin-Adrian: "Re: How do fix a good solution against spam.." 
    To: "Gregory Sutter" <gsutter@zer0.org>, "Fernando Schapachnik" <fernando@mecon.gov.ar>
Date: Sat, 15 May 2004 13:24:16 +0200

    > On 2004-05-14 08:40 -0300, Fernando Schapachnik <fernando@mecon.gov.ar> wrote:
    > > As everybody is throwing in their favorite anti-spam solutions, here's mine:
    > >
    > > http://www.paganini.net/ask/
    > >
    > > From the home page:
    > >
    > > ASK takes advantage of the fact that most spammers use invalid or
    > > fake "From:" address in their messages. When a new message arrives
    > > and the sender is unknown, ASK sends a "confirmation message"
    > > back, informing the sender that the original message has been
    > > queued, pending confirmation. When the sender confirms (a simple
    > > reply), ASK delivers the original message and adds the sender to a
    > > "whitelist". Further messages from this sender will be immediately
    > > delivered.
    >
    > (I apologize for posting this O/T message.)
    >
    > Here's a well-thought-out argument against systems of this type:
    >
    > Challenge-Response Anti-Spam Systems Considered Harmful
    > http://kmself.home.netcom.com/Rants/challenge-response.html

    I don't know ask, but I'm using tmda which is configured to NOT send any query.
    this way, the offending messages are queued until I release or delete them using
    tmda-pending.

    so, such tool may not be so problematic, but the configuration or the
    implementation
    may be :(

    the first versions of tmda don't allow to not bounce, the first thing I've done
    was to patch tmda to go this way, then I submit the patch which wasn't accepted
    at first. the time beeing, it was implemented differently, but the idea was kept
    :P

    here is the trick :

    echo 'ACTION_INCOMING = "hold"' >> ~/.tmda/config

    don't know if ask may hold queries instead of bouncing ?

    Cyrille Lefevre. 

    -- 
home: mailto:cyrille.lefevre@laposte.net
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  • Next message: Anton Alin-Adrian: "Re: How do fix a good solution against spam.."

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