Multiple domain name pointing to the same IP address


I wonder, will there be any problem or not if i register two domain name, Ex: and and I want this two different domains to point to my single public IP address provided by my ISP.

so in overall, when someone send mail either to or, the mail will go to the same person.

Is it possible to setup with my above configuration or not? once again, two domain name pointing to the same IP address.


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Irwin SantosComputer Integration SpecialistCommented:
yes you can do that.
Irwin SantosComputer Integration SpecialistCommented:
Yes this is possible, You only need to have the Authoritative DNS servers setup to handle both domains.

Your email servers could work on the same server,  and NO it will not go to the same person, while you work on mail servers you'll figure out how to create a second domain on it just like FTP sites and the webpage.

even if both domains resolve to same IP is like and, DNS is what makes the trick.

One serve could be a host for many domains, only need to work on DNS zones to create for each domain.

So the answer to your questions is YES IT POSSIBLE with no problems.

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mrpc_cambodiaAuthor Commented:
ok thanks, then i come to my problem again.

As i have said, I have registered two different domains from two different domain providers plus I got my public IP from my local ISP. so at the moment both domain will resolve to my single public IP. but the problem is when someone send mail to, it works. and when a mail is sent to, it doesn't work.

I use MS exchange as my email server. and i did created both email address on my mail server. and Locally on my lan, I can send mail to these two address without any problem.

could u give further comments please?

Keith AlabasterEnterprise ArchitectCommented:
What is your mail server? have you associated the second domain with each user?

for example, in Exchange, you would create a second smtp address for each user using the second domain.

The one issue you will have is that you an only have one reply address by default (one or the other). if you wanted to reply using either smtp address you would need to add the from field in your emails so you could amend as required.
You just have to make sure the alias is set up correctly for both domains. I ran 3 or 4 domains from a single server at my house for a while, using multiple registrars for my domains. As long as the alias is set up correctly, it should work like a champ. I had a similar issue to what you were having, and it all came down to double and triple checking I had the right alias set up.
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