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(e.g. "backscatter", "image spam")

Featured Articles

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ORF 6.1 Change Log

3 weeks ago — applies to ORF 6.1
The complete list of changes implemented in ORF 6.1 compared to the previous 6.0.1 release.
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Known Issues

3 weeks ago — applies to ORF 6.0.1
This article contains the complete list of known issues with the latest ORF 6.1 version.
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Exchange 2013 Service Pack 1 compatibility requirements

3 months ago — applies to ORF 6.0.1 / ORF 6.0 / and 5 other product versions
Microsoft® Exchange 2013 Service Pack 1 shipped with a defect that needs fixed before ORF can be used with SP1. This article describes how to fix the defect.
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What are the system requirements of ORF?

3 months ago — applies to ORF 6.0.1
ORF requires the following minimal configuration.
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Is Exchange 2019 supported by ORF?

3 months ago — applies to ORF 6.0
Yes, Microsoft® Exchange 2019 is fully supported by ORF.
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Recommended DNSBLs, SURBLs and External Agents

3 months ago
The following article lists the recommended DNS Blacklist, SURBLs, and External Agents Vamsoft recommends. Enabling these will ensure high spam catch rate while keeping the false positive rate at a minimum.
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"SERVFAIL, RCODE 2" DNS lookup error logged for certain SURBL tests

3 months ago
You may receive this error message if obsolete SURBLs are enabled on the SURBL Test page.
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How do I configure ORF to move spam into the users' Junk E-mail folder?

3 months ago
Instructions for tagging and redirecting blacklisted emails to the Junk E-mail folder in various versions of Exchange.
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Is there a best practices document for ORF?

3 months ago
Yes, it is called the Best Practices Guide. We also recommend reading the ORF 101 Guide, which covers the basics of ORF.

Popular Articles

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ORF Issue History

3 weeks ago
This page describes the issues we had in older ORF releases. The latest version is shipped with fixes for all the bugs below (see all current known issues with the latest ORF version in this KB article).
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My users seem to receive spam from themselves. How do I stop that?

3 months ago
Read our article for possible solutions: How to blacklist self-spam?.
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ORF 6.0 Change Log

3 months ago — applies to ORF 6.0
The complete list of changes implemented in ORF 6.0 compared to the previous 5.5.1 release.
hnp1 | hnp2