For MySQL, Hsphere does display hostname at "Databases -> MySQL -> MySQL DBs".
For Mail, you can look at the DNS configuration for the domain.
It will point to the mailserver that will look like "mail1.your-service-domain.com".
Aratha,
You say you saw 'win1.aratha.net' -- the 'win1' is your web server.
The alias of your domain is used so if you are a reseller, then your clients never know who the top-level provider (Jodo or maybe someone above them 8o) is...
Tim
How did I find that, that ask?
I pinged mail.arathra.net and got 64.71.228.12
pinging that IP, with -a didn't help, so I pinged mail1.arathra.net which didn't match IPs, but then mail2.arathra.net gave same IP as above...