[expert] multiple names on one machine?

[Bruce E. Harris]

Hi,

I have a DNS server, web server and working on a mail server on my desktop.
I am wondering if I can use several name on one machine. For example can I name
the web server "www" mail server "mail" instead of the machine name on the same
box?

TIA

Best Regards, Bruce
"If it ain't broke, you're not trying" The New Red Green Show