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reformail(1)


NAME

   reformail - E-mail reformatting tool

SYNOPSIS

   reformail -s command [option...]

   reformail -D len filename

   reformail -x header:...

   reformail -X header:...

   reformail [options...]

             See below for additional options

DESCRIPTION

   The reformail program reads a message on standard input, reformats it
   in some way, and writes the message to standard output:

   Splitting mailboxes into individual messages
   The -s option splits the mbox-formatted mailbox file on standard input
   into individual messages. An external program is executed for each
   message. The contents of each individual message will be provided to
   the external program on standard input.

   If the FILENO environment variable is set to a number, reformail will
   consecutively increment FILENO each time the program is executed for
   each individual message.

   If FILENO is not set, it's initial value will be "000". If FILENO is
   set to a non-numeric value, FILENO will remain unchanged.

   Detecting duplicate messages
   The -D option implements a simple way to delete duplicate messages in
   incoming mail.  filename is a file that will be approximately 'len'
   bytes long. This file will be used by reformail to save message IDs
   seen in recent mail.  reformail reads the message on standard input. If
   the message has a Message-ID: header that's already in the cache file,
   reformail terminates with the exit code set to 0. Otherwise, reformail
   terminates with the exit code set to 1.

       Note
       Unlike a similar feature in the formail command, reformail takes
       care of locking the file, so it's not necessary to implement your
       own locking mechanism for this option.

   Extracting headers
   The -x and -X options extract the indicated headers from the message,
   and print them to standard output. Multiple -x and -X options can be
   specified at the same time, and may be intermixed.

   The -x option extracts and prints the contents of the header. The -X
   option prints the name of the header as well.

   In all other situations, reformail copies the message on its standard
   input to its standard output, reformatting the message as follows:

OPTIONS

   -a'header: value'
       Append a custom header to the message if this header does not
       already exist. If the header is either Message-ID: or
       Resent-Message-ID: and the value is empty, reformail generates a
       (hopefully) unique message ID for you.

   -A'header: value'
       Append a custom header to the message even if this header already
       exists. If the header is either Message-ID: or Resent-Message-ID:
       and the value is empty, reformail generates a (hopefully) unique
       message ID for you.

   -c
       Concatenate multi-line headers. Headers split on multiple lines are
       combined into a single line.

   -dn
       If n is 1, each line will be terminated with CRLF. If n is 0
       (default), each line will be terminated with LF.  reformail reads a
       message with either line terminator, and will force the message to
       have the specified line termination.

   -f0
       Any initial blank lines are removed. If the first non-blank line is
       a "From_" line, it gets converted to a "Return-Path:" header, and
       any existing "Return-Path:" header gets removed. If the message
       does not start with a "From_" line, the message remains unchanged.

   -f1
       Add the "From_" line to the message, if it's not there.  reformail
       will attempt to generate the "From_" line from any Errors-To:,
       Return-Path:, or From: headers in the message. "root" will be used
       if reformail is unable to determine the return address.

   -i'header: value'
       Appends a custom header to the message. If this header already
       exists it is renamed by prepending "Old-" to the name of the
       header.

   -I'header: value'
       Append a custom header to the message. If this header already
       exists in the message, the old header is completely removed. If the
       value is empty, any existing header is completely removed, and
       nothing gets appended.

   -R oldheader: newheader:
       Rename the indicated header.

   -u'header:'
       If this header occurs multiple times in the message, remove all
       occurrences except the first one.

   -U'header:'
       If this header occurs multiple times in the message, remove all
       occurrences except the last one.

AUTOREPLIES

   The autoreply options from earlier versions of mailbot have been moved
   into mailbot(1)[1].

BUGS

   For the -a, -A, and -I options, a space after the header name and the
   colon is considered to be a non-empty field.

   Do not provide the same header to more than one family of
   header-modifying options, such as -u/-U and -a/-A. Doing so yields
   unpredictable results. It's better to run reformail several times (use
   a pipe, perhaps).

SEE ALSO

   courier(8)[2], sendmail(8), mailbot(1)[1], maildrop(1)[3].

AUTHOR

   Sam Varshavchik
       Author

NOTES

    1. mailbot(1)
       http://www.courier-mta.org/maildrop/mailbot.html

    2. courier(8)
       http://www.courier-mta.org/maildrop/courier.html

    3. maildrop(1)
       http://www.courier-mta.org/maildrop/maildrop.html



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