Both you and
jhourcle are right. Relying solely on a whitelist is not the way to go. What I was suggesting was to include that as part of a solution.
I know that with Thunderbird, even though it's using a whitelist, I go through every time I d/l e-mail and see if something got filtered that shouldn't have. The program's learning is part of the solution as well, however it may be beyond the scope of what the op intends.
Useless trivia: In the 2004 Las Vegas phone book there are approximately 28 pages of ads for massage, but almost 200 for lawyers.
