We have an Exchange 2007 server on our network. I've changed ISP carrier but have kept the same company that is hosting my domain name as well as MX record. This old ISP also passes/delivers the emails while checking for SPAM. I'm told that now that we are no longer using them as our ISP I have to change from the mail domain name to their Authentication SMTP site as well as change the port from 25 to 587. Is this done at the Hub Transport under Server Configuration? Can I edit an existing configuration or create a new one? Stumped....
Thanks.