This is really confusing to me.
Apparently you can set up multiple A records for your domain. And you do this by adding new A records to DNS editor/zone.
My hosting account grants me 5 IP addresses. Before there existed only 1 A record for my main IP. And that worked fine... when you entered my site's URL (with or without the "www"), you got to my site.
The thing is, I use all 5 IPs to send bulk email. The rDNS records for all my IPs link to my domain, but the forward DNS doesn't. So to fix that, I needed to create new A records for those IPs, right?
And so I did. And the names for all the A records were left blank, I didn't use "*", "@" or "www". That fixed the forward DNS issue for all my IPs.
The thing is, each time I went to my site's domain ("domain.com"), it returned this page: /cgi-sys/defaultwebpage.cgi
But when I entered "www.domain.com" it went to the correct page (my index page).
What I want to know is:
How can I enable forward DNS for all my IPs, while still being able to access my site without appending "www." to its URL?
How do I properly create the necessary A records?