MX Records

[Barry Trottier]

Why are MX Records needed?

Can your site not receive mail without them?

Also, how can they be set up if you only have 1 IP address for your computer
+ site (ie the IP of the computer is the IP of the site).  It seemed by
reading info on MX Records that they sent mail to a machine and it seemed
that the machine needed to be an 'A' record and therefore have a different
IP from the actual mysite.com IP.

Am I missing something here?

Thanks in advance.