On my Exchange 5.5 server in Routing Restrictions, I have the "Hosts and clients with these IP addresses" checked. This has no entries, to disable relaying/spamming.
I have an NT Workstation with a program called Automate installed. Automate will let you schedule sending an SMTP e-mail; the message is filled out with standard information, such as server, sender, recipient, etc. I plan to have a number of these set up, e-mailing different attachments to different people.
The problem is, when I go to send the e-mail, I get the 550-Relaying is prohibited message, which makes sense. When I uncheck "Hosts and clients with these IP addresses", it works as expected.
The question is - how to configure Exchange to let this computer generate and send e-mails without opening up relaying on the server. I have tried adding the IP address of the Automate machine to the "Hosts and clients with these IP addresses", but this does not work.