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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.

ORF is the best anti-spam software around (in my opinion) and the support is the best. And especially for schools, the pricing is right on the money!

Peter Zawodny, I.T. Network Administrator, New Plymouth Girls' High School

The 30-day statistics below are generated from automated, anonimized reports received from ORF users worldwide.
Total emails filtered Spam rate
257,678,462 49.18%
More
  • ORF 5.5.1 is now available

    The new version is a minor bugfix release that patches a number of small but important issues. See the Change Log for details.

    Get your registered copy from the Client Portal or the evaluation version from (…)
  • ORF 5.5 is now available

    We are pleased to announce that ORF 5.5 is now available for download. The new release focuses on performance, usability and on request we've been receiving from all of you. We hope you will be pleased (…)
  • ORF 5.5 public preview

    We are happy to announce that the first public preview of ORF 5.5 has finally arrived. Get the beta from here.
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.
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