If I have a domain, say novell.com. If I want to have mail handled for a
test, can I:
1) Create A record test.novell.com
2) create mail server mail.test.novell.com
2) Create MX record for test.novell.com and point it to mail.test.novell.com

Most importantly, would it not disrupt mail going to novell.com?

(Told you it was dumb!)