my $mech = WWW::Mechanize->new();
$mech->get($url);
$mech->form_name('loginform');
$mech->field(login => $username);
$mech->field(passwd => $password);
$mech->click();
my $outpage = $mech->content();
open(OUTFILE, ">$outfile");
print OUTFILE "$outpage";

##</code><code>##

/You have \d+ unread messages/

##</code><code>##

if ( $outpage =~ /(You have \d+ unread messages)/ ) {
    open( FINAL, ">", "make_up_a_file_name" ) or die $!;
    print FINAL $1,"\n";
    close FINAL;
}