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Unable to resolve Google hosted email accounts

Scenario

- We have email hosting via Google with the domain name company.com.
- We also have an Active Directory domain with the same namespace.
- We provide hosted services for small businesses and host their email on an Exchange server on the company.com domain.  We use aliases to give them a user@therecompany.com e-mail account.

Problem

Our clients can not send email to us at support@company.com because the internal DNS server thinks it knows how to resolve that name but is unable to resolve.  Is there a way to resolve this issue either via DNS or Exchange Server?
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JrSysAdmin
Asked:
JrSysAdmin
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1 Solution
 
mlongohCommented:
Are your clients e-mail addresses also @company.com?
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JrSysAdminAuthor Commented:
Clients are their own e-mail address, i.e. user@therecompany.com
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Simon Butler (Sembee)ConsultantCommented:
You need to share the SMTP address space. You haven't said which version of Exchange you are using.
Exchange 2003: http://semb.ee/sharesmtp2003
Exchange 2007: http://semb.ee/sharesmtp2007
Exchange 2010: http://semb.ee/sharesmtp2010

Although you made a major mistake in using your own domain to host Exchange particularly if you aren't going to use it yourself.  You should really have built a seperate platform for hosting Exchange that was isolated from your own network.

Simon.
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mlongohCommented:
So what you want to do is configure the Exchange system to forward mail destined for @company.com to the MX record of your Google mail.  I'm assuming that someone external to your clients can get mail to you with no problem.

Simon's links I think are appropriate - I did this years ago on an Exchange 2003 server.  In essence I had a client running an old mail system on a separate domain and needed Exchange to route mail to the old system if the SMTP recipient couldn't be found in the Exchange system.  In your case, it's the same concept.
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