ONElist message detector
An implementation of a mailing list detector, for ONElist mailing lists.
ONElist was eaten by eGroups which became Yahoo! Groups so this detector
is really only useful for historical mail.
Inherited from Mail::ListDetector::Detector::Base.
Accepts a Mail::Internet object and returns either a
Mail::ListDetector::List object if it is a post to a ONElist
mailing list, or "undef".
No known bugs.