I'm currently assigned the administration of a server that is accessed through a subdomain of another (not administrating example.com but y.example.com), and assigned to implement a web application on it. To allow registration, the web app requires sending email, so I'm configuring the server's mail service (is that the correct way to do it?)
So I tried using this guide to make sure it is implemented correctly. Unfortunately I wasn't sure what to write as hostname and domain. While I after using telnet it gave me correct output, I couldn't reach it using thunderbird. It suggested that hostname should be something like this
myhostname = mail.example.com
mydomain = example.com
but I guess that would only work if it actually was done on example.com? How do I handle this?