Mailshell develops the award-winning SpamCatcher Engine, the easiest and most accurate solution to spam. The company's products include anti-spam software developers' tools and a suite of enterprise and personal anti-spam products.

Mailshell currently offers two products for home users:

• a complete web-based Intelligent Email and spam-blocking service
• SpamCatcher Desktop software, available via download

In addition to serving as the core of Mailshell's personal anti-spam products, the SpamCatcher engine is the only anti-spam solution developed explicitly to integrate spam-blocking technology with common IT components, including security appliances, mail servers, anti-virus applications and many others. By using the SpamCatcher development kit, Mailshell's enterprise partners gain significant competitive advantages, and dramatically reduce the costs and time to market required for delivering seamlessly integrated spam filtering to their customers.

Mailshell was founded in January of 1999 and currently blocks spam for more than 800,000 people worldwide. The privately-held company is based in Santa Clara, CA, with an additional office in San Francisco.