NAME
    undupe-mail-body - Print only the non duplicate messages based on body.

SYNOPSIS
      undupe-mail-body -help

      undupe-mail-body <mbox> [mbox2 , [mbox3 , ... ]]

      undupe-mail-body mbox-with-body-dups > mbox-without-body-dups

DESCRIPTION
    I found at least two ways -- procmail(1) and mutt(1) -- which can delete
    duplicate messages based on the "Message-ID" header. Failed i to find
    anything which would delete messages based on duplicate BODIES.

    Given *mbox*-format mailboxes, this program prints, on *standard out*,
    only those messages which are unique based on only the body. Original
    mailbox is accessed only for reading. Only the first encountered
    instance (of multiplicates) is retained.

  Incorrect start of email found
    For some of the messages in a mailbox, which otherwise load up fine in
    mutt(1), Mail::Mbox::MessageParser indicates "Incorrect start of email
    found". Turning off "enable_cache" (and "enable_grep") on the first run,
    or a rerun with "enable_*" options turned on does not cause "Incorrect
    start of email" to be printed.

    So, please do not be alarmed (like i did) if the above happens.

OPTIONS
    help
      Show help message.

    ordered
      Keep the order of output same as input, minus any duplicates.

      Currently, it is a hard coded value.

TO DO
    Allow *ordered* option to be set on command line.

    I would like this program to be a filter such that it gathers the input
    on *standard in* in addition. This can be achieved by giving *STDIN to
    "Mail::Mbox::MessageParser->new()".

BUGS
    * After building a cache for the first time for a mailbox, same SCALAR
      reference is printed (via "printf STDERR ..." in get_body_digest())
      for all the messages. Any subsequent runs produce the expected output.

AUTHOR, LICENSE, DISTRIBUTION, ETC.
    Parv, parv(at)pair(dot)com

    Modified: Nov 17 2005

    This software is free to be used in any form only if proper credit is
    given. I am not responsible for any kind of damage or loss. Use it at
    your own risk.