Email:
Send mail to
mail-server@rtfm.mit.edu
containing the following:
send usenet/news.answers/mail/filtering-faq
UUCP:
uunet!/archive/usenet/news.answers/mail/filtering-faq
Hard Copy:
A printed version of that FAQ is in Chapter 25 of the book
Internet Secrets by John R. Levine and Carol Baroudi; published
1995 by IDG Books; ISBN 1-56884-452-2.