Hope this isn't a repeat. I tried to leave a comment earlier but may have fumbled it. I'm the author of UseBestMail. Tim's dismisses UseBestMail without understanding it or better yet, trying it out himself. If he'd done either he would have discovered that UseBestMail marks subject lines like his product does -- simply. It looks like he has a good procuct too. But Tim is wrong about UseBestMail. First, no ISP involvement is needed. The client software in cooperation with our server does the whole job. If you read the more detailed articles at the web site you'll find out that it works between a few friends who want a spam-free channel, or as a very complete anti-spam solution -- including whitelist, challenge/response and preview -- in addition to effortless stamps. And, it's free. I personally invite you to try it out for yourself. Go to my web site at: http://www.usebestmail.com And email me if you'd like to comment on it or have any trouble at all. Regards, Martel Firing