SaferMail is a simple little application to stymie spammers. PHP Version Features: Allows mailto links that are not exposed to robots, MySQL driven, easy set-up, and more great features.

Safermail

Basically, it does the same work that a mailto: HREF would do but does it without exposing the email address to spammers.

It checks if a web browser has requested the email address in keeping with several rules. If those rules are satisfied, it redirects the user to their mail client. ASP.NET Version Features: Allows mailto links that are not exposed to robots. PHP version and C#/Access2003 versions available. Easy set-up.