version 1.2.1 of the DCC

Vernon Schryver vjs@calcite.rhyolite.com
Mon Sep 1 02:00:33 UTC 2003


Version 1.2.1 of the DCC source is in
http://www.rhyolite.com/anti-spam/dcc/source/dccd.tar.Z and
http://www.dcc-servers.net/dcc/source/dccd.tar.Z

The CHANGES file starts with:

    Fix typo in default map.txt noted by Michael Ghens.
    Fix undetected hash table size overflow noted by Leandro Santi.
    Fix "BRAND" error in start-dccd.
    Fix inflation of target counts on greylisted messages.
    Dccd is off in the default dcc_conf.
    Reduce default greylist embargo to 4.5 minutes.

1.2.0 seems as good as 1.1.45 as long as you stay away from greylisting,
and greylisting hasn't had and catastrophic crashes.  So it seems time
to try 1.2.1 more widely.

Greylisting is definitely interesting.  The biggest problem is that
some legitimate SMTP clients retry as quickly as 1 second (Cox.net),
while some 419 spammers wait as long as 5 or 6 minutes between tries.
5 minute retries seem popular among legitimate SMTP clients.
I'm currently playing with a compromise embargo of 4.5 minutes.

  
Vernon Schryver    vjs@rhyolite.com



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