{
    $OUT = '';
    my $transport = 'transport_maps = hash:/etc/postfix/transport ';
    my $display = 0;
    use esmith::DomainsDB;
    my $domainsdb = esmith::DomainsDB->open_ro();
    for my $domain ($domainsdb->get_all)
    {  
        my $mail_server = $domain->prop('MailServer')
                          || $DelegateMailServer
                          || 'localhost';

        if ( $mail_server ne 'localhost' )
        {
           $display = 1;
        }
    }
    $display = 1     if (
        $SMTPSmartHost
        &&
        ($SMTPSmartHost ne 'off')
        &&
        ($SMTPSmartHost !~ /^\s*$/)
    );
    $OUT = "$transport\n" if $display eq 1;
}

