822bodyfilter - filter message body through a program.

822bodyfilter prog

822bodyfilter reads an 822-format email message from standard input. It executes prog with the body of the message on standard input, and prints the message headers followed by the output from prog to standard output. If 822bodyfilter encounters a temporary error in executing prog, it exits 111. If 822bodyfilter encounters a permanent error in executing prog, it exits 100. Normally, 822bodyfilter yields the same exit code as prog. The standard input to 822bodyfilter must be seekable.

822bodyfilter considers the end of the message or the first line that cannot be part of an 822-format header field to terminate the message headers. A nonblank line that terminates the headers is part of the message body.