Stopping Spam by Alan Scwartz and Simson Garfinkel Following are the changes made in the 10/98 reprint. Here's a key to the markup: [page-number]: serious technical mistake {page-number}: minor technical mistake : important language/formatting problem (page-number): language change or minor formatting problem ?page-number?: reader question or request for clarification (187) Index entry "mknocem, 175" changed to "mknocem, 130, 175". <194> In "About the Authors," replaced the 2 paragraphs with: Alan Schwartz is an assistant professor of clinical decision making in the Department of Medical Education at the University of Illinois at Chicago. He is the author of Managing Mailing Lists (O'Reilly & Associates, 1998). In his spare time, he develops and maintains the PennMUSH MUD server and brews beer and mead with his wife. As mail administrator for a number of organizations, he deals with unsolicited email on a daily basis; as the moderator of the rec.games.mud.announce Usenet newsgroup, and a NoCeM issuer for rec.games.mud.admin, he gleefully fights back against newsgroup spam. Turn-ons for Alan include sailing, programming in Perl, playing duplicate bridge, and drinking Anchor Porter. Turn-offs include spam (obviously!) and watery American lagers. Simson Garfinkel is a computer consultant, science writer, and columnist for the Boston Globe. He is the author of PGP: Pretty Good Privacy (O'Reilly & Associates, 1994) and the coauthor of Practical UNIX & Internet Security (O'Reilly & Associates, 1996) and Web Security & Commerce (O'Reilly & Associates, 1997). Mr. Garfinkel writes frequently about science and technology, as well as their social impacts. This is his seventh book. (195, last page) In para. 2, lines 1 and 2, removed "(and Hanna Dyer designed the CD label)".