Forgive my ignorance, it's been a long time since I've done much Exchange work.
We have an SMTP connector set up for our legacy app on the web server, it's all locked down to specific IP addresses and whatnot, but we use a lot of throwaway addresses that we don't want to receive email on.
How can I set up an exchange account to have permission to send as
*@example.com (even when the address does not exist in the exchange server)? I know it can be done because I used to have it done on our old Exchange server, but I'm just having a mental blank today!