{   
    $OUT = '';

    use esmith::DomainsDB;
    my $domainsdb = esmith::DomainsDB->open_ro();

    for my $domain ($domainsdb->domains)
    {   
        my $mail_server = $domain->prop('MailServer')
                          || $DelegateMailServer
                          || 'localhost';

        next if ( $mail_server ne 'localhost' );

        $emaildomain = $domain->key;
        $OUT .= "$emaildomain:127.0.0.1\n";
    }
}
