This one I was using before I started tracking my email filter with rcs(1) but still after switching from procmail. That doesn't really help narrow it down any more than "at least 2009".
pkg/DESCR: > This module analyzes mail objects in any of the classes handled by > Email::Abstract. It returns a Mail::ListDetector::List object > representing the mailing list. > > The RFC2369 mailing list detector is also capable of matching some > Mailman and Ezmlm messages. It is deliberately checked last to allow > the more specific Mailman and Ezmlm parsing to happen first, and > more accurately identify the type of mailing list involved. Comments, OK?
p5-Mail-ListDetector-1.04.tar.gz
Description: application/tar-gz
