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Grepmail searches mailboxes to build a new mailbox with all emails containing the results, so that they can be reviewed with your favourite mail tool. The default is to search for the pattern in both the head and body of the email. Only email headers are searched if you specify -h; search is restricted to email bodies with -b. To be case insensitive use -i and to ignore MIME-encoded blocks use -M. Date searches are effected with -d which allows a date string in a variety of formats, including -d yesterday, -d "5/18/2001" for email since 18 May 2001.
The basic use is:
$ grepmail <string> [<mbox>] > <newmbox>
So, for example, you might search for the email containing that meeting:
$ grepmail -RMi "that meeting" ~/mail > meeting.mbox
This takes about 10 minutes to search my 2GB of mail files.
But perhaps you want just a report of files in which the email appears:
$ grepmail -RMir "that meeting"
More complex patterns are possible:
$ grepmail -RMih "^From.*Freddy" ~/mail
And to search specific headers:
$ grepmail -RMiY '(^TO:|^From:)' [email protected] ~/mail
