Hi,
In our company, our server admin configure that allow IP addresses' servers can connect exchange email relay, and send out emails from that IP addresses' servers. In case an IP address is not added to access in exchange server, it cannot connect the relay
(i.e. no authorize to access)
However, is it possible to limit that some IP addresses' servers can only send email to internal email domain but not to external email domains ?
The emails can be sent from different email accounts on the same server host. So I think we cannot use email account to control such condition.
If you have any idea on how to do this, please kindly share your opinion with me.
Many thanks for your kind attention,
Ray