sub display_email
{
    my ($fn) = @_;

    print "<center>file <i>$fn</i></center>\n";
    if ( open EMAIL, $fn ) {

        print "<hr width=600><br>\n<pre>";
        $/ = '';
        $header = <EMAIL>;              # slurp entire mail header in
        $header =~ s/\n\s+/ /g;         # merge continuation lines
        foreach $_ ( split "\n", $header ) {
            print "$_\n" unless (
                                /^Message-Id:/
                         ||     /^Content[-\w]*:/
                         ||     /^X-[-\w]*:/
                         ||     /^Status: RO/
                         ||     /^Received:/
                         ||     /^Mime-Version:/ );
        }
        # end of headers, now read and display the body of the email
        $/ = "\n";
        print "\n";
        while( <EMAIL> ) {
            chomp;
            # print lines of the file, line-wrapping at column 80
            while ( length($_) > 80 ) {
                print substr( $_, 0, 80 ), "\n";
                $_ = substr( $_, 80 );
            }
            print "$_\n";
        }
        print "</pre>\n";
        close EMAIL;
    }
}