The 1.1.16 version of MacBiff for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. MacBiff for Mac lies within Communication Tools, more precisely E-mail.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most popular version of the application is 1.1. This program's bundle is identified as org.forkit.MacBiff. This free Mac application was originally designed by Branden Moore.
From the developer:
MacBiff is a GPL'd Mac OS X "Biff" Program. It periodically checks your IMAP server for new email, and reports where in your folder hierarchy your new mail resides.
In the latest version an issue that stopped MacBiff from consistently retrieving passwords the from Keychain has been resolved and IMAP UTF7 support has been added.
You may want to check out more software for Mac, such as MacMassMailer, Portable Thunderbird or MailStewardLite, which might be similar to MacBiff.