splitmail(1)                     DG/UX R4.11                    splitmail(1)


NAME
       splitmail - split a mail message into MIME-compliant partial messages

SYNOPSIS
       splitmail [-d] [-v] [-s splitsize] [-p prefix] [-i id-suffix]
       [filename]

DESCRIPTION
       The splitmail program breaks a mail message into smaller pieces using
       the "message/partial" type defined by MIME, the proposed Internet
       standard for multimedia mail formats.

       By default, the message is taken from the standard input, or if
       filename, is specified, the message is read from the named file.
       splitmail then produces a set of partial message files that are MIME
       compliant.

       The names of the output files are /tmp/split.1 for the first part,
       and so on.  The prefix /tmp/split can be overridden using the -p
       option.

   Options
       splitmail supports the following command line options:


              -d          specifies that the mail should be delivered.

              -v          specifies that the verbose flag should be passed
                          to sendmail.

              -s splitsize
                          specifies a chunk-size for splitting messages that
                          overrides the current setting.

              -i id-suffix
                          causes splitmail to generate the pieces with
                          similar (but not identical) message-id fields, in
                          a format which allows them to be easily correlated
                          with one another and which end with the suffix
                          provided on the command line after -i.

              -p prefix   causes splitmail to use the specified prefix
                          rather than the default prefix (/tmp/split) for
                          naming the split files.

              filename    causes splitmail to read the message from the
                          specified file rather than the standard input.

USAGE
       The default chunk size for splitting messages is 250K (250000) bytes.
       The size can be overridden with the -s switch, or with the
       environment variable SPLITSIZE.  The minimum value is 20000 bytes.

       Messages smaller than the chunk size will not be turned into partial
       messages, but will be written to a single file or delivered as a
       single message.

       SPLITSIZE may be used to override the default chunk size, or to
       ensure that your messages are unlikely ever to be split.  Setting
       SPLITSIZE to a value of 4000K (4000000) will effectively ensure that
       splitting will not occur, but it may also cause mail to be rejected
       by some mail transport software.

   Warnings
       If the size of the input is near the limit, and if the input is
       coming from a file rather than standard input, splitmail will
       sometimes estimate the number of parts wrong and will have to write
       out an extra part.  This is harmless but annoying.  It is especially
       annoying if the estimate was 2 but the real number was 1.

SEE ALSO
       mailto(1), metamail(1), mime(5)

NOTICES
       Author is Nathaniel S. Borenstein, Bell Communications Research, Inc.


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