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jsctechyFlag for United States of America asked on

Exchange multiple SMTP domains

Hi All,
I'm running Exchange 2003.  I have 2 domains.  Domain1 and Domain2.  I need to setup DOMAIN2 on the existing exchange server.  How can I do this?  I do not want to get all new users that are created both email address (user1@domain1.com and  user1@domain2.com).  I've tried recipient policies, but gave the new user 2 email addresses, 1 in each domain.

Any idea?
ExchangeEmail ServersActive Directory

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8/22/2022 - Mon

You can setup an additional recipient policy but only have it apply to a subset of your accounts, based on OU or a custom attribute.

If you can put all your new users in a different OU than your existing users, this would be easiest.

well all users in this SMTP are in 1 OU.

Can you create a custom attribute for the new users to distinguish them from the existing users?
Your help has saved me hundreds of hours of internet surfing.

You can use the Filter in the Recipient Policy to do an LDAP query.  The query can look at an attribute, group membership, ou, or other.



They have something to distinguish them.  They're user accounts are "user1@domain2.domain1.com"

Where as other accounts are just "User1@domain1.com".

It was working in the past, however over the last 2 weeks has stopped.

Are the names of the user accounts in the form of "user1@domain2.domain1.com" or is that the email address format you are trying to apply with a recipient policy?

If that is a sample email address, you can use a recipient policy to add that address, based on other criteria for those accounts in AD, by using an LDAP filter.

If that is the actual format of the account name, you can probaby do the same with an LDAP filter as well.  I don't have access to ESM right now to give you a more specific syntax.

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The logon accounts are 'user1@domain2.domain1.com', but the SMPT mail is user1@domain2.com.

I haven't worked w/ recipient policies much, or attributes.  Will need help with that.

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How many users are we talking about here?