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Hosting Multiple Domains on 1 Mail Server

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DTBMCC

IS-IT--Management
Jun 23, 2003
9
US
A company is divesting from its parent and creating a new mail server and network infrastructure at their own site. The child is operating under abc.com while under its parent. Mail for that domain is currently still being handled by the parent.

The "child" mail server is set up under a seperate domain ... 123.com, the mailboxes have been copied and mail is currently being forwarded from the parent's mail server to the child's mail server. Mail is being stored at both sites for the transition period. Users are accessing their mail on the child mail server, and have an email address both for abc.com and 123.com. The abc.com address is set to primary as they want this to be the reflected reply address. We now want to redirect the MX records and add the domain abc.com to the child mail server so that mail sent to abc.com can be received and handled by the mail server. Handling more than one domain via exchange is a new area for me, so I would appreciate your help with several questions.
- I understand I need to modify the recipient policy to add the new domain. I have already done this however it is not set to primary. What is the significance of an SMTP entry being set to primary or secondary? Will mail be received on both domains regardless of the primary/secondary designation? I am especially concerned about the user's ability to receive the abc.com mail and reply to it with the abc.com reply address. Is there anything else I need to do? When I added the abc.com SMTP address to the recipient policy it asked if I wanted to propagate the policy to the users (sorry, I forget the exact language). I said "no" since I felt I had the user email addresses already set with the abc.com and 123.com addresses and did not want to introduce issues with this set up.
- I have Mail enabled distribution groups set up with the 123.com address since that is all that is available to me until the abc.com domain is hosted by the 123 domain. Do I need to do anything such that these will work properly when the new domain is hosted? There is only one email address allowed, but my assumption is the distribution groups will break out into the individual users who have both the abc and 123 email addresses and get handled appropriately. Is this a correct assumption?

Is there anything else I need to do? Gotchas, watchits? This is a 24x7 small shop with tiny windows to make these changes. They must be done right the first time.

Thanks for all help. I appreciate it very much.

 
See thread858-720370

the primary is the one that it defaults to for the users, newly created ones, or the ones where the update with default policies is turned on.
it will receive on all SMTP domains, at least, if their respective MX record points to your server.
The " propagate the policy to the users" is that thenew domain will add itself to all users, thus giving them a second address, if you said no, they won't be affected.


Marc
[sub]If 'something' 'somewhere' gives 'some' error, expect random guesses or no replies at all. Please specify details.
Free Tip: The F1 Key does NOT destroy your PC!
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