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Re: SPAM filter...
From: "Paul Kurczaba" <paul () myipis com>
Date: Thu, 18 Dec 2003 15:01:35 -0500

Kerio MailServer, although not open source, has a "max. number of unknown
recipients (directory harvest attack protection)" feature. I have enabled
this on my email server, and have it set to 5. Therefore, when the spammer
guesses five incorrect email addresses, the mailserver will block the
spammers IP. It is very effective.

-Paul Kurczaba
----- Original Message ----- 
From: "Vedantam sekhar" <sekhar56us () yahoo com>
To: <security-basics () securityfocus com>
Sent: Saturday, December 13, 2003 1:04 AM
Subject: SPAM filter...

Dear All,

Can any body suggest me the mail filter
software(Opensource :-)) which can avoid the
dictionary atttacks on the server.Our mx server has
Solaris O.S.

The spammmers are trying to find out the Valid E-mails
by blindly sending mails to randomly selected
characters as receipent ID?



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