I am currently signing up to test an online email security and continuity product for our onsite exchange.
I have sorted the inbound email path by altering my MX records for the test domain. i can see all incoming emails going through the security service.
I now need to configure my Exchange to route outgoing emails through their servers also. I have multiple domains setup for receiving mail, but currently only use one for all outgoing mail. I want to setup the exchange so that the default domain doesn't change but anything that comes from the test domain is routed through the email security server.
i thought it was simply the case of creating a new send connector, but after trying and it failing i realised that the ADDRESS space you specify is for the recipient not the sender.
What is the best way to achieve what i want to do? is it even possible?