My setup currently consists of a unmanaged server to run my site, databases, and more. I'd like to buy a separate email host such as one of GoDaddy's plans to send out my XenForo forum emails. How can I do this so the smtp information I enter in XenForo sends the emails from <name>@<mydomain.com>? As far as I can see, I just have to enter the third party service's smtp information but where's the link to my domain that makes it @<mydomain.com>? I'm really confused and want to make sure I know everything before buying.