Post.Office 3.5.3 version 720, an update of the mail and list server for Mac OS X from
Tenon Intersystems, has been released. The update offers extended Spam filtering, improved IMAP handling, 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.
Post.Office is a scalable SMTP/POP3/IMAP messaging server designed to meet the needs of small and mid-sized Internet service providers (ISPs). In the latest version,
has been added to Post.Office as the first plug-in. SpamAssassin filters Spam using a range of techniques, including a Bayesian Classification scheme that’s considered 98 percent accurate.
Tenon’s built-in Spam filtering can be used in combination with SpamAssassin to create personalized header filters, block specific IPs and take advantage of specific real-time black hole sites. A customer-maintained “Post.Office Stop SPAM”
is also available to help fight Spam.
Version 720 is free to registered users and free for those using 10 accounts or less. For others, Post.Office is offered on a sliding scale, depending on how many mailboxes and mailing lists are needed. A starter package is available for US$295 and supports 100 mailboxes and 10 lists. Mailboxes or lists can be purchased in blocks of 100 for $150 ($75 for educational customers). For thousands of mailboxes, a range of packages are available. WebEdge, a Web-based mail client is a one-time $500 add-on. The software is also available pre-configured on an Apple Xserve system.