Bains Software today announced the release of SpamSweep 1.6, the latest release of its spam filter for Mac OS X. The software is an advanced bayesian spam filter offering several filtering technologies, including domain and relay blacklists, sender whitelisting, and a bayesian filter to automatically delete spam messages before they’re downloaded by an email client. This version improves Leopard compatibility, adds support for IMAP accounts and custom rule filters, and includes various bug fixes. [ Price: US$25 ~ Requires: Mac OS X 10.4 or later ~ Free Trial available ]