IMFilter - IMFilter is a utility for IMail administrators who wish to apply a rules.ima file across multiple domains and users for filtering Email, spam, and/or viruses. IMFilter does not actually filter messages, rather it automates the management of rules.ima and .fwd files so that IMail's built in filtering mechanisms can be used more efficiently.

IMFilter originally cost $20 but has since been been re-released as freeware. Support is now on an "as-available" basis for this program, but to date no IMFilter users have had any significant problems.