Enable SpamSieve for more Powerful Spam Filtering
SpamSieve works with Postbox via an add-on on Mac OS X. SpamSieve complements Postbox with powerful spam filtering. Make sure you are running the latest version of SpamSieve and then follow the SpamSieve instructions for using it with Postbox.
Note: If you purchased Postbox via the Mac App Store, you will need to download and use the version from our website which supports Add-ons. Your Mac App Store purchase will be transferred automatically to this version, for more details see: http://postbox-inc.com/?/blog/entry/postbox_now_available_in_the_mac_app_store/