This article talks about the Platform for Privacy Preferences Project, and talks about P3P's goal of building trust between users and Web site operators without requiring users to read and interpret the site's privacy policies.
"Finally, IBM backs its slick ad campaign with an equally slick e-business-ready Web application server". Review from Network Computing, by Richard Hoffman.
Excellent tutorial on how sendmail's rewriting rules work. Written by Brian Costales, the author of the best sendmail book around, "Sendmail", published by O'Reilly and Associates.