use MIME::Parser;

my $parser = new MIME::Parser;
my $output = "/tmp/mimex";

$parser->output_dir ($output);
my $entity = $parser->read (\*STDIN);

open my $fh, "<", $csv_filename; # That line was missing a lot

my $csv = Text::CSV->new ({ binary => 1, auto_diag => 1, sep_char => "|", allow_whitespace => 1 });
my $processed = 0;

#print "test4\n";

while (my $row = $csv->getline ($fh) {
    @$row or next; # skip empty lines
    if ($indata == 0) {
        @data = @$row;
        if ($row->[0] eq "Subject:") {