This is a Debian prepackaged version of the grepmail utility.

This package was put together by Joey Hess <joeyh@debian.org>, using
sources from:
	http://grepmail.sourceforge.net/

grepmail was written by David Coppit (david@coppit.org) and is licensed
under the GPL. On Debian systems, the full text of the GPL is in
/usr/share/common-licenses/GPL