10/30/2008
How ISP's and mailservers can stop the top botnet spammers
http://www.secureworks.com/research/threats/topbotnets/?t...
The general rule for an ISP is that clients shouldn't be allowed to send mail themselves through their own mailagents. It should all go through a mailserver and security installations and filters and preferably not on port 25.
About 90% of all email is spam according to new figures I have seen flowing around.
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