Getting Clueful: Five Things You Should Know About Fighting Spam
The battle for your users’ e-mail inboxes probably will never end,
but it’s not a failure of technology. Experienced e-mail and system
administrators share the key points they really, really wish you
understood.
http://www.cio.com/technology/infrastructure/security/spam/
five_things_about_fighting_spam.html?CID=28830
Thanks to everybody who contributed. :-)
Esther