Email Namespace issues

[Richand]

We recently merged with a business at work which have there own domain and internal exchange 2003 mail server.

we also have a domain with exchange 2003 (not heard of upgrades at our place!)

I have setup the trust between the sites and this is working fine and users can authenticate fine.

the problem is the dev teams have been merged and have existing email accounts on each of the servers, but I need them to both use the same email address and for the exchange servers to deliver the mail to the right domain.

so for example:

user1 is on domain1 with MX record pointed to exchangeserver1
user2 is on domain2 needing delivery of email sent to exchangeserver1 but his mailbox resides on exchangeserver2, which is part of domain2.

how do I get this working?

exchangeserver1 uses webroot email security and the SMTP connector uses the wildcard(*)....which I understand would override any second delivery connector?....

any exchange experts out there willing to give some insight? Microsoft technet documents are very confusing!

 

[HungryHippos]

The way you handle this largely depends on whether you want to share the same email domain address space. If you need users on both platforms to have email addresses of [email protected] then you will need to share the SMTP namespace across the servers.

If however your users have different email domains then you don't need to worry too much about that and it's more about message routing to ensure one server forwards on to the other properly if a user has mailbox addresses on both servers.

Would probably need more info on what you want to happen here to be honest to give you a better solution really.

For the SMTP connectors, if you create a new one but set the cost of the SMTP domain to be lower than the default * Internet connector it will route via that first.