ISPs could cut spam easily, says expert

By John E. Dunn
Techworld
18 January 10

Two simple techniques could be used to strangle botnets, a security expert has claimed. First, block email port 25 by default. Second, tell users when they are spewing spam from compromised PCs.

According to Trend Micro's CTO, Dave Rand, who is leading a campaign to reform the way ISPs approach the matter of botnets and spam, the two countries that adopted such techniques, The Netherlands and Turkey, have seen a huge reduction in the numbers of botnetted PCs.

According to his own figures and analysis, Turkey went from having around 1.7 million compromised PCs per month to only 35,000 after implementing techniques through its major ISP, Turk Telekom.

"They went from the number one spam source in the world to off the charts, said Rand. "They don't appear in the top 50 now."

Or alternativly, you can purchase 'Caretaker Antispam' available from iremove.nl