Summary: Search mailboxes for mail matching a regular expression

Description:
grepmail looks for mail messages containing a pattern, and prints the
resulting messages on standard out.

By default grepmail looks in both header and body for the specified
pattern.

When redirected to a file, the result is another mailbox, which can, in
turn, be handled by standard User Agents, such as elm, or even used as
input for another instance of grepmail.

Maintainer: danf