Tenon Intersystems today announced that Post.Office 3.5.3 version 717, the company’s mail server and list server for Mac OS X, is now available for Mac OS X 10.2.3 with a new Web-based mail client, WebEdge 3.6 This enhanced version of Post.Office adds SPAM filtering extensions and IMAP improvements to the list of Post.Office features, while the new WebEdge supports both POP and IMAP, includes a spell checker, an address book, a calendar, and customizable HTML templates. Post.Office is priced on a sliding scale, depending upon how many mailboxes and mailing lists are needed. A starter package is available for US$295, supporting 100 mailboxes and 10 lists.