Qualcomm has released Eudora 5.2, the latest version of their popular email program. The most important and welcome feature is that Eudora filters can now match addresses in incoming messages against the contents of address books; this lets you separate mail from people already in your address book from those with whom you haven’t already corresponded, like spammers. The other major improvements relate to security; Eudora now supports Kerberos V Authentication, and the SSL support previously available under Mac OS 9 returns for users of Mac OS X 10.2. Eudora 5.2 also includes numerous other small changes and bug fixes, such as improved performance opening many windows, a help button added to all error dialogs and standard alerts, support for drag & drop to and from the Filters window, personality-specific x-eudora-settings (I’ll update the list available from [email protected] soon), carbonized Menu Sharing for compatibility with utilities like Web Confidential, support for importing Microsoft Entourage mailboxes by putting them in the Delivery folder, and more. Eudora 5.2 works under PowerPC-based Macs in Mac OS 8.1 through Mac OS 9 (a 4.4 MB download), and is native in Mac OS X (a 3.7 MB download). New copies of Eudora 5.2 cost $40 in Paid mode; upgrades from Eudora 4.3 through 5.1.1 cost $30 if that copy was purchased more than 12 months ago, upgrades for purchases made in the last year are free. As always, you can use Eudora for free in Light mode (with reduced features) or Sponsored mode (with full features and ads).