=head1 NAME

B<prsfrom> - supply missing Date: and From: fields to mailboxes

=head1 SYNOPSIS

B<prsfrom> [B<-o> F<output_mailbox>] [F<input_mailbox>]

B<prsfrom> [B<-h>]

=head1 DESCRIPTION

B<prsfrom> is a tool meant to be used in conjunction with B<mhonarc>.
B<mhonarc> extracts the date from a message from Date: or Received:
fields from the message-header. The sender is extracted from a From:
field. There are several cases when these fields are missing ( e.g.
out-boxes of Eudora, DEC-mailx). In all these cases it is possible to
extract the sender and the date from the message separator line.

B<prsfrom> checks messages in mailbox F<input_mailbox> (or standard input
if F<input_mailbox> is not specified) for the presence of Date:,
Received:  and From: fields. If information is missing B<prsfrom>
attempts to construct these fields from the message separator.
B<prsfrom> assumes the message are separated by a line of the following
form.

>From sender date

The new Date: and From: fields are written directly after the message
separator. A new mailbox is written to standard output or the file
specified with the -o option. If the -o option is used some statistics
are reported to standard output.

If the -h option is specified a usage summary is written to standard
output.

=head2 Options

=over

=item B<-h>

A usage summary is written to standard output. No further processing is
done

=item B<-o> F<output_mailbox>

Default the new mailbox is written to standard output. With the
-o option a file to receive the new mailbox can be specified.
If the -o option is specified, some statistics are written
to standard output.

=back

=head1 RESTRICTIONS

B<prsfrom> also changes the headers of message in
mailboxes included as attachments in other message.

=head1 RETURN VALUE

The return value of B<prsfrom> is always 0

=head1 SEE ALSO

=for html
See the <a href="http://www.oac.uci.edu/indiv/ehood/mhonarc.html">mhonarc home-page</a>.

=head1 AUTHOR

=begin latex

A.R. Burgers\\
Netherlands Energy Research Foundation ECN\\
P.O. Box 1, 1755 ZG Petten, The Netherlands\\
e-mail: burgers@ecn.nl

=end latex

=for text
 A.R. Burgers
 Netherlands Energy Research Foundation ECN
 P.O. Box 1, 1755 ZG Petten, The Netherlands
 e-mail: burgers@ecn.nl

=for html
A.R. Burgers <br>
Netherlands Energy Research Foundation ECN <br>
P.O. Box 1, 1755 ZG Petten, The Netherlands <br>
e-mail: <a href="mailto:burgers@ecn.nl">burgers@ecn.nl </a>