Why do you care? Because at CFun-03 on Sunday, June 22, he will be presenting on the topic of "What email is and how to control it," which will examine how email works, what the headers of a message mean and the various ways that one can determine if a message is spam just from the headers. Using this information to build custom anti-spam agents will also be provided.
If you hate spam as much as Michael does, you might want to sit in and listen.
For more information on CFUN-03, visit the CFUN-03 website at www.cfconf.org/cfun-03.