I have a problem with sending outgoing emails from my exchange to some specific domains, usually domains like (.co.uk - .co.ae - .net.sa)
I have a SMTP Connector setup on the Frontend Exchange and configured to use DNS and with an address Space of (*). When i ticked the (Allow messages to be relayed to these domains) the messages gone out but i can't keep this because i don't want to put my mail server in the street :)
How can this problem be managed without configuring my mail server for open relay ??