{
   return "" ; #not used
   # as we might have virtualdomains we prefer this over luser_relay
   return "# we bounce all unknown address $EmailUnknownUser not set or equal to returntosender " unless (defined $EmailUnknownUser and $EmailUnknownUser ne 'returntosender');
   $OUT = "catch-all";
    my $i = 0;
    use esmith::DomainsDB;
    my $ddb = esmith::DomainsDB->open_ro;
    my @domains = map { $_->key } $ddb->get_all_by_prop('type' => 'domain');
    foreach my $domain ( @domains )
    {
        my $d = $ddb->get($domain);
        next if (($d->prop('VirtualMail') || "disabled") eq "enabled");
        next unless (($d->prop('MailServer') || '') eq '');
        $OUT .= "\@$domain  $EmailUnknownUser\n";
    }
}
