I am setting up a server to host an application which will be on a subdomain, let's say "application.foo.com". "foo.com" is hosted on a completely different server, points to a different IP, etc.
Do I want the FQDN for my new server to be based off the domain, such as "theserver.foo.com", or based off of the subdomain, such as "theserver.application.foo.com"?
Does it even make any particular difference? The application is a LAMP stack application which should be connecting to some sort of external mailserver.