Open source and free under the GNU General Public License (GPL)

Protection on the most common email protocols: SMTP, IMAP, and POP

Unlike desktop solutions, Untangle sits at the network gateway so there is only one application to keep up-to-date, which Untangle does automatically

Protection for webmail and file transfer via HTTP and FTP protocols, an increasingly common route for infection

Reports and event logs show you what viruses are being blocked on the network

Viruses can disrupt business, destroy data, and spread to your customers - a scenario that no business owner ever wants to face. You can now protect your entire network from virus threats with our purpose-built antivirus application. Whether it’s a virus, worms, Trojans or malware, our Virus Blocker keeps emails, webmail, downloads and file transfers safe with the latest advances in antivirus technology, and works within a variety of different protocols.

Your business gets full, comprehensive virus protection, updated regularly, so you’ll always have the most current protection available. Plus, you’ll also get the big picture view of your antivirus environment, including what viruses are being blocked.

Untangle Forums: Virus Blocker Lite
Untangle Wiki: Virus Blocker Lite

Virus Blocker Lite is based on the ClamAV project.