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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.

I just recently came across ORF while searching for a tool providing recipient validation. Luckily, I found your site and the software was exactly what I needed! I just wanted to thank you for programming this super cool software! Our spamrate decreased heavily just by using recipient validation and greylisting.

Matthias Hartung, CIO, Haushaltwerbung Walter

The 30-day statistics below are generated from automated, anonimized reports received from ORF users worldwide.
Total emails filtered Spam rate
297,726,292 61.85%
More
  • ORF 6.0 Beta R02

    The latest beta release of ORF 6.0 with Exchange 2019 support and bugfixes is now available. Get it now from the beta site.
  • ORF 6.0 public preview

    If you have been wondering what to expect from the next ORF release, wonder no more. The first public preview version of ORF 6.0 is now available and you are invited to test it. Get it now from the beta (…)
  • 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 (…)
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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