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A handy UNIX command that lists the e-mail that's waiting in the mailbox, printing sender address (not necessarily the From header) and the date. For example:

> from
From everything@blockstackers.com  Tue Sep 12 09:37:12 2000

The format may differ from flavor to flavor, but the basic functionality is the same.

If your flavor doesn't have it (IRIX boxes in here don't have it, at least), a reasonable facsimile goes like this:

grep "^From " $MAIL

assuming the system uses standard mbox format, not some funky format like mh or something. (As for script lisence: take it, it's yours =)

See also: "From " line