Prolateral Consulting Ltd
Prolateral Consulting Ltd

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"McColo was the last of the old-school monolithic ISPs," says Craig Fisher, Technical Director. "More of the spam is currently being generated by botnets, with one of the largest being driven by Cutwail. This makes it harder to cripple a botnet at a single point."

Cutwail is estimated to be behind over a third of all spam and activity dropped to almost nothjing after the shutdown, but it is now back on the rise. "McColo shutting down taught the spammers an invaluable lesson, and they have regrouped and are more prepared with distributed command and control"