Re: Slightly OT: Greylisting success or failure stories?

From: Kevin J. Cummings (cummings_at_kjchome.homeip.net)
Date: 02/17/05

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    Date: Thu, 17 Feb 2005 14:05:14 -0500
To: David Hoffman <dhoffman2004@gmail.com>, For users of Fedora Core releases <fedora-list@redhat.com>

    David Hoffman wrote:
    > I looked for any discussion lists about greylisting and haven't found
    > any, so I thought I might try asking here.
    >
    > I'm considering adding greylisting to my postfix configuration, and
    > some of the articles I have been reading about greylisting show that
    > there can be any of several situations in which greylisting would not
    > be a viable solution.
    >
    > In particular they mention issues with how some MTAs break something
    > in the RFC that makes greylisting work, and how receiving mail from a
    > site which uses multiple relay hosts (each with a different address)
    > can also cause mail to not be delivered.
    >
    > So I thought I would ask on the list to see if anyone has done much
    > with greylisting and found it to be good or bad.

    I installed milter-greylist-1.6. It got rid of 95% of my SPAM email.
    I went from 300-400 messages a day to 2-3. And those are coming in
    through my fetchmail account, so there's not much I can do about it.
    I rely on Spamassassin and the Bayesian filters in Thunderbird to get
    rid of most of those.

    I liked greylist-1.6 so much that I made an FC2 RPM (and SRPM) for it
    (from the 1.4 SRPM and the 1.6 tarball). It is available here:

            http://kjchome.homeip.net:81/milter-greylist-1.6-0.i386.rpm
            http://kjchome.homeip.net:81/milter-greylist-1.6-0.src.rpm

    > I do also use the DNSBL lists, and some of my accounts also use TMDA.
    > What I am hoping for is that with greylisting, I can further reduce
    > the amount of spam mail traffic.

    I started by using SPAMHAUS blocking in sendmail. Then I installed
    Spamassassin (as a procmail filter to flag SPAM), and then I added the
    SPF-milter. None of these made dent like milter-greylist did!

    I'm still running all four, and a much happier camper now. 

    -- 
Kevin J. Cummings
kjchome@rcn.com
cummings@kjchome.homeip.net
cummings@kjc386.framingham.ma.us
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