I have an exchange 2010 server that needs to accept any email but send out only ones that are coming from the 4 PCs within the domain. Sounds easy and maybe it is but so far i can't make it happen. Here is my problem and my constraints.
I am not an exchange admin, but the guy that i paid a lot of money to configure it, apparently is not one either. He left the server in a configuration that allowed my exchange server to be an open relay.
I have a dynamic IP so i use no-ip.com to sync my IP so it appears static, and i use authSMTP to help my email not get on black lists.
What i need to do is Allow anonymous users inbound, not outbound. The server should accept emails inbound from any email address. But the server needs authentication outbound.
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