Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My company recently acquired another firm. I am thinking of bringing their mailboxes onto our email server (Exchange Server 2003).

  1. Can I host multiple domains on my exchange server? Where can I find information on this?
  2. Can I do this without creating another Active Directory domain?

I would prefer to make them a regular user in my current domain ( but have email addresses as

Edit ~ Also, how do I handle reverse lookup? Since I'll be pointing their MX to my current server, when they send emails as, would't it reverse to Would this cause a problem for reverse lookup?

share|improve this question

You can host email for multiple domains in Exchange Server 2003. You need to add the new domain to your Recipient Policy in Exchange System Manager (you probably only have the Default Recipient Policy so it should be easy to find). You then need to create users (with mailboxes) for these new users. After the users\mailboxes are created they'll get all of the email addresses from your Recipient Policy and you can then set which email address you want to be their primary email address in the properties of their user accounts.

share|improve this answer
I would also have to point their MX to my email server, but how do I handle Reverse Lookup? Currently I had my ISP created a PTR for – Saif Khan Jun 24 '10 at 16:51

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.