hpn01 | hpn02
An excellent spam filter for Microsoft Exchange servers!

“The interface is simple and powerful, and I love that you give me all the options I need to protect my Exchange Server from open relay spam. It's nice to see an honest company charging a fair price for well written software.”

Mike Harrison, Eclipse Marketing Inc.

ORF wins VB Spam Award
Efficient

EFFICIENT

Employing the extremely effective combination of automatic tests like DNS blacklists and SURBLs (including Spamhaus ZEN and uribl.com), the reverse DNS test, the HELO/EHLO domain test, the SPF test and Greylisting, ORF catches an enormous amount of junk all by itself. The filtering efficiency can be improved further by using user-defined keyword, character set and attachment filtering rules. ORF is also capable of stopping specific type of attacks like email backscatter using External Agents. Thanks to the several filtering techniques involved, the catch rate is 96-99%, while the chance for false positives is close to zero.

Maintain

LOW MAINTENANCE COSTS

The online black- and whitelists are always queried in real-time, so you never have to download any definition files to keep your ORF configuration up-to-date. By enabling the Auto Sender Whitelist feature, ORF will collect all addresses your users send mail to – you can be certain the reply will arrive to their inboxes without adding any addresses manually.
Filtering spam has never been this easy!

Scalable

SCALABLE

ORF is software that shows a continuous qualitative improvement with better hardware: thanks to its resource-friendly design, it consumes as little memory and processor time as possible. It performs well even on older servers, but on a more advanced hardware, it can handle even millions of mails per day without issues: it is lean and remarkably effective at the same time. The same applies to the software requirements: ORF supports older software environments like Microsoft® Windows 2000 with IIS 5 SMTP Server, and it can also be used with cutting edge products like Windows Server 2008 and Microsoft® Exchange 2007.

Extensible

EXTENSIBLE

ORF can be used in conjunction with other anti-virus and anti-spam products using External Agents. As of writing this, we have 15 External Agent definitions available for download on our site including ClamAV, a free and excellent anti-virus product. Attaching these softwares to ORF could significantly boost filtering performance and allow you to set up a first line of defense against viruses and other threats. We also offer smaller add-ons against specific types of spam attacks (like email backscatter or image spam), these can also be attached to ORF via External Agents.

Affordable

REASONABLY PRICED

ORF is licensed per server, which makes it an ideal choice for small, mid-sized and large companies as well. It does not matter if you have thousands of users with multiple mailboxes: as long as ORF is installed to a single server, you will need only one license to cover it all (compare pricing with similar products). Moreover, you will also get a one-year SMA (Software Maintenance Agreement) bundled to your license, so you are guaranteed to get all new releases for one year from the purchase with no further costs.

Manage

EASY TO MANAGE

ORF comes with an intuitive interface and several tools to ease the management of your configuration and provide valuable feedback regarding the filtering performance. The Log Viewer has excellent and easy to use filtering options, so you can find out what happened to a specific mail in a few seconds, even if your daily log has thousands of entries. The Reporting Tool helps you to create graphical reports about the filtering performance and informs you about the efficiency of different tests, so you can tweak your configurations accordingly.