Multiple domains on Exchange 2003 1

[mikem501]

Hi,

We have MS Exchange 2003 Standard Corporate. We have an AD domain called company1.com.

We have decided to run another company on the same Exchange server, therefore we have purchased domain company2.com and is pointing the same ip address of company1.com smtp (exchange) server.

We have created a user with a primary smtp e-mail address user@company2.com. The user can send e-mails and receive internal ones, but cannot receive e-mails from 3rd party users.

The error is : unable to relay. I have selected to allow any server to relay through my exchange server (from the smtp virtual server) and it works but obiously this is not very smart as my server is an open relay.

How do I tell my exchnage server that company2.com is our own domain?
The relay filter works one-way only, how can I tell my exchange to relay e-mails only destined to company2.com?

This is so simple but I cannot find the right config form - where is it??

Cheers.

 

[mikem501]

ok - found it - writing this post has illuminated me.
I was adding the smtp address manually and it does not work out.

You have to add the addresses using the group policy - there you will find the tick that (this server is responsible to deliver the mail ..bla..bla ..bla.)

Cheers

 

[58sniper]

You don't use GPOs to add email addresses. The domain MUST be listed in a recipient policy for Exchange to handle email for it.

Pat Richard, MCSE MCSA:Messaging CNA
Microsoft Exchange MVP
Want to know how email works? Read for yourself -

http://www.ietf.org/rfc/rfc2821.txt

 

[kbing]

Correct. You must use Recipient Policies. It sounds like you mentioned group policy while meaning Recipient Policies.

 

[mikem501]

You are absolutely right. Star for you!
It is the best & shortest possible answer ever in this forum to answer the question on how to allow your exchange server to host multiple domains.
Well done!

 

[monsterjta]

To my understanding, you will need recipient policies setup regardless of how many domains you are hosting on your Exchange Server...

Hope This Helps,

Good Luck!

 

[58sniper]

That's correct. If a domain doesn't appear in a recipient policy, Exchange won't handle mail for it.

Pat Richard, MCSE MCSA:Messaging CNA
Microsoft Exchange MVP
Want to know how email works? Read for yourself -

http://www.ietf.org/rfc/rfc2821.txt