BiffLes

BiffLes is a powerful software that acts as a mail delivery agent, similar to the "procmail" MDA but does it all in one run. The software is designed to be used offline, by dial-up clients who fetch mail via a nightly cron-job, store it locally, and then sort it out. The main goal of BiffLes is to test received mail against a set of rules and sort them accordingly. If the mail matches a particular rule, then it is added to the corresponding outbox. If there are no matching rules, then the mail is left in the mailbox.

One of the key features of BiffLes is that the rules are pairs of header name and regexp, and a number of rules can be tied to a particular mailbox, limited only by Perl resources. It supports various mailbox types such as mbox, maildir, mh, and any other supported by the Mail::Box object class. Also, a number of mailboxes can be opened concurrently, and it's possible to configure BiffLes to match with many outboxes for carbon functionality.

To run BiffLes, you need to have Perl, Getopt module, AppConfig object class, and Mail::Box object class installed. In the latest release of the software, a new backend - PerlEmailProject was introduced. Reports are now wrapped in XML, and the license has been upgraded.

Overall, BiffLes is a great software to sort and manage your emails with ease, and it's perfect for dial-up clients who require offline mail access. The various features make it a powerful tool that can be seamlessly integrated into most email management systems.