Post.Office: Simple, Secure & Powerful

Now with SpamAssassin & New Plug-in Architecture

Santa Barbara, CA, September 11, 2003.

Post.Office 3.5.3 version 720, the premier mail server and list server for Mac OS X, is now available for Mac OS X as a free upgrade, with new features and extended SPAM filtering. Post.Office is being used around the world to support 10s of thousands of mailboxes on Solaris, NT and other platforms. However, outside of Japan, this powerful, scalable mail server is now only supported on Apple's Mac OS X. The new Mac OS X version includes improved IMAP handling, improved and extended relay protection in the form of POP-before-SMTP and SMTP Authentication, and a new plug-in architecture to support external mail processing engines. The popular SpamAssassin has been added to Post.Office as the first plug-in.

SpamAssassin ( filters SPAM using a wide range of techniques, including a Bayesian Classification scheme considered 98% accurate. It requires no configuration. Tenon's built-in SPAM filtering can be used in combination with SpamAssassin to create personalized header filters, block specific IPs and to take advantage of specific real-time black hole sites. A customer-maintained "Post.Office Stop SPAM" Wiki site ( is also available as a SPAM fighting resource.

Post.Office is offered on a sliding scale, depending upon how many mailboxes and mailing lists are needed. A starter package is available for $295, supporting 100 mailboxes and 10 lists. Mailboxes or lists can be purchased in blocks of 100 for $150 ($75 educational). For thousands of mailboxes, a range of packages are available to cater to Universities, corporate enterprises, and ISPs. WebEdge, a web-based mail client is a one-time $500 add-on. The software is also available pre-configured on an Xserve box to the users specifications. For 10 accounts or less, both Post.Office and WebEdge are FREE!

Tenon Intersystems, under the auspices of their Japanese partner, Open Technologies, has brought Openwave's well-regarded Post.Office to Apple's Mac OS X. Founded in 1989, Tenon Intersystems is a leader in high-performance networking. Tenon technology has provided the framework for world-class networking on the Macintosh and Tenon is continuing that tradition on Mac OS X. Tenon Intersystems can be reached in the U.S. at 805-963-6983, by the internet at, or via the web at .

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