Bill Cole: > If your mailstore uses mbox or Maildir, the unmaintained antique software > named "procmail" could be used for delivery. As an antique myself, I use it, > but I cannot in good conscience recommend anyone else adopt it de novo.
It looks like procmail is maintained again, by the original author even (with interesting background on the procmail code, too): https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1006633#24
