We recently aquired another business and it's domain name. We'll call it NEW. They currently have their email being hosted by another company. I want to bring it into our Exchange 2010 server. Would all I have to do is contact their DNS provider and tell them to point the MX records to my IP? Do I add the NEW domain to the Accepted domains in the Organization>Hub Transport tab? Am I missing anything? Would I need to do anything with reverse DNS?