uw-mailutils 7:2002edebian1-13.2 (amd64 binary) in ubuntu gutsy

 C-client is a library of functions for accessing mail folders and messages.
 It was written as part of the University of Washington IMAP server, but has
 since found other use as well.
 .
 This package contains some programs that can be used with the libc-client
 mail handling library. They are:
 .
 mailutil: a program for dealing with mailboxes of various types.
 dmail: a Mail Delivery Agent (MDA) for use with procmail
 tmail: a Mail Delivery Program (MDA) for use with sendmail etc.