John R. Levine is an Internet author and consultant specializing in email infrastructure, spam filtering, and software patents. He chaired the Anti-Spam Research Group (ASRG) of the Internet Research Task Force (IRTF), is president of CAUCE (the Coalition Against Unsolicited Commercial Email), is a member of the ICANN (Internet Corporation For Assigned Names and Numbers) Stability and Security Advisory Committee, and runs Taughannock Networks. He has co-authored many books, including (with Carol Baroudi and Margaret Levine Young), UNIX For Dummies (with Margaret Levine Young), Fighting Spam for Dummies (with Margaret Levine Young, Ray Everett-Church), and flex & bison (O'Reilly). He was also the mayor of the village of Trumansburg, New York, United States from March 2004 until March 2007.