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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.

In the first hour that ORF was installed, it blocked 30% of our mail legitimately. I monitored the log files and made sure that the messages it was blocking were actual spam and they were.

(anonymous comment)

The 30-day statistics below are generated from automated, anonimized reports received from ORF users worldwide.
Total emails filtered Spam rate
358,765,072 58.13%
  • ORF Licensing Model is Changing

    Together with the release of ORF 6, at the end of next month, we are changing our licensing model. ORF 6 and future versions will only be available through subscription. Perpetual licenses and maintenance (…)
  • 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.
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.