grepmail: search mailboxes for mail matching an expression

    2020-05-05 14:20           0 usr/
    2020-05-05 14:20           0 usr/bin/
    2020-05-05 13:35       73231 usr/bin/grepmail
    2020-05-05 14:20           0 usr/share/
    2020-05-05 14:20           0 usr/share/doc/
    2020-05-05 14:20           0 usr/share/doc/Cygwin/
    2020-05-05 14:20        2287 usr/share/doc/Cygwin/grepmail.README
    2020-05-05 14:20           0 usr/share/doc/grepmail/
    2020-05-05 14:20       30760 usr/share/doc/grepmail/CHANGES
    2020-05-05 14:20       18009 usr/share/doc/grepmail/LICENSE
    2020-05-05 14:20         434 usr/share/doc/grepmail/META.yml
    2020-05-05 14:20        1172 usr/share/doc/grepmail/MYMETA.json
    2020-05-05 14:20         711 usr/share/doc/grepmail/MYMETA.yml
    2020-05-05 14:20        6683 usr/share/doc/grepmail/README
    2020-05-05 14:20           0 usr/share/man/
    2020-05-05 14:20           0 usr/share/man/man1/
    2020-05-05 13:35        7280 usr/share/man/man1/grepmail.1.gz