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The new ORF 5. Simply different.

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ORF is our award-winning spam filtering software for Microsoft® Exchange Server.

Layered protection

No single technology catches all spam. The 23 layers of tests in ORF ensures the maximum detection rates.

ORF ♥ administrator

From the industry's best logs to the friendly UI, ORF works for the administrator, saving time, resources and sanity.

No false positives

Never miss an important email again. ORF ships with multiple dedicated tools against false positives.

Proven performance

Deployed at 11,000 organizations in 112 countries, ORF filters thousands of emails every second, 24 hours a day.

Your product is as close to bullet proof as I have ever seen. My install of ORF has been running for over 6 months without a reboot or modification and is still doing exactly what is expected. When I consider that we have processed 37 million pieces of mail without a single user complaint or whitelist request in that time, I can't help but be impressed! Add to that the outstanding customer support/service and you get the best anti-spam solution on the market hands down.

Brett Larson, MCSE MCT CSSA, Lighthouse Consulting Inc, Seattle WA

The 30-day statistics below are generated from automated, anonimized reports received from ORF users worldwide.
Total emails filtered Spam rate
372,103,914 62.62%
  • ORF 6.0 Beta R06

    The sixth release of ORF 6.0 Beta with minor cosmetic changes and extended expiration is now available. Update your previous beta releases to extend your evaluation time to May 31, 2019.
  • ORF 6.0 Beta R05

    The new update is a minor bugfix release that also extends the evaluation time of any ORF 6.0 beta installation to March 31, 2019. Get it now from the beta site.
  • ORF 6.0 Beta R04

    ORF 6.0 Beta R04 fixes a major bug that was found in the last beta release and improves the overall filtering performance of ORF. Download the new version from the beta site.
Ready to experience ORF? Take the tour, try ORF now free for 42 days, or take the deep dive and buy a license.
We offer a 90 day, no questions asked money-back guarantee.