splitmail(1) UNIX System V (Release 1) splitmail(1)
NAME
splitmail - Split a large mail message into MIME-compliant
partial messages
SYNOPSIS
splitmail [-d] [-v] [-s splitsize] [-p prefix] [-i id-
suffix] [file-name]
DESCRIPTION
The splitmail program will take an email message and break
it up into smaller pieces using the "message/partial" type
defined by MIME, the proposed Internet standard for
multimedia mail formats.
By default it will take the message either from standard
input or the named file, and will produce a set of partial
message files with names like "/tmp/split.1" for the first
part, and so on. The prefix "/tmp/split." can be overridden
using the "-p" option.
If the -d option is specified, the mail will actually be
delivered. If -v is specified, the verbose flag will be
passed to sendmail.
The -i option can be used to make splitmail 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.
The default chunk size for spliting messages is 250000 at
most sites, though this is also a compile-time option. This
can be overriden with the -s switch, or with the environment
variable SPLITSIZE.
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.
ENVIRONMENT
SPLITSIZE overrides the default chunk size. Setting
SPLITSIZE to, say, 4000000 will effectively ensure that your
messages are unlikely ever to be split, but it may cause
them to be rejected by some mail transport software.
SEE ALSO
mailto(1), metamail(1)
BUGS
If the size of the input is just on the fencepost, and if it
is coming from a file rather than standard input, splitmail
will sometimes estimate the number of parts wrong and will
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splitmail(1) UNIX System V (Release 1) splitmail(1)
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.
COPYRIGHT
Copyright (c) 1992 Bell Communications Research, Inc.
(Bellcore)
Permission to use, copy, modify, and distribute this
material for any purpose and without fee is hereby granted,
provided that the above copyright notice and this permission
notice appear in all copies, and that the name of Bellcore
not be used in advertising or publicity pertaining to this
material without the specific, prior written permission of
an authorized representative of Bellcore. BELLCORE MAKES NO
REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY OF THIS
MATERIAL FOR ANY PURPOSE. IT IS PROVIDED "AS IS", WITHOUT
ANY EXPRESS OR IMPLIED WARRANTIES.
AUTHOR
Nathaniel S. Borenstein, Bellcore
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