better techniques to identify and remove zero-day viruses from cyrus store sought

Joseph Brennan brennan at
Tue Aug 21 14:14:30 EDT 2007

John Crawford <jmc-cyrus at> wrote:

> What's the best way, and second best way to react to zero-day virus
> threats - messages that are delivered to the mail store before the
> detection is in place?

Refuse mail with executable attachments.  List is at:

This 100% effective and there are no zero-day or zero-hour problems.
Done here since February 2003.

Joseph Brennan
Lead Email Systems Engineer
Columbia University Information Technology

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