MacBiff is a "Biff" tool for Mac OS X. It periodically
checks your IMAP server for new email and reports
where in your folder hierarchy your new mail resides.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Various bugfixes are incorporated in this release, plus some new features such as forcing it to check for new mail on SIGUSR1, and the ability to execute a shell command on new mail, as well as alerting whenever new mail is received, even when unread mail already exists. Also, some bandwidth-saving features have been implemented in the backend.