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MyDoom worm
On 27 January 2004, the “Mydoom” email worm began spreading through internet email systems at an exponential rate. At its height, Mydoom was infecting nearly 10% of all email messages sent on public and private networks.
During the Mydoom attack, the ICC email relay service, which handles approximately 170,000 emails on a typical day, reached over 430,000 email messages. Of this volume, the virus scanning on the email relay identified, and correctly acted upon hundreds of thousands of infected messages.
The anti-virus software that protects the ICC email relay servers has, at most, a one-hour delay between the time a new virus patch is published by the anti-virus service provider to the time the patch is installed and in-effect on the ICC servers.
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