grepmail: search mailboxes for mail matching an expression

    2016-03-29 07:32           0 usr/
    2016-03-29 07:32           0 usr/bin/
    2016-03-29 07:32       73524 usr/bin/grepmail
    2016-03-29 07:32           0 usr/share/
    2016-03-29 07:32           0 usr/share/doc/
    2016-03-29 07:32           0 usr/share/doc/Cygwin/
    2016-03-29 07:32        2089 usr/share/doc/Cygwin/grepmail.README
    2016-03-29 07:32           0 usr/share/doc/grepmail/
    2016-03-29 07:32       30760 usr/share/doc/grepmail/CHANGES
    2016-03-29 07:32       18009 usr/share/doc/grepmail/LICENSE
    2016-03-29 07:32         434 usr/share/doc/grepmail/META.yml
    2016-03-29 07:32        1118 usr/share/doc/grepmail/MYMETA.json
    2016-03-29 07:32         653 usr/share/doc/grepmail/MYMETA.yml
    2016-03-29 07:32        6683 usr/share/doc/grepmail/README
    2016-03-29 07:32           0 usr/share/man/
    2016-03-29 07:32           0 usr/share/man/man1/
    2016-03-29 07:16        7297 usr/share/man/man1/grepmail.1.gz