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Email for Internal Use Only

Posted on 2006-07-03
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Last Modified: 2010-03-06
How can I create a mailbox store so that the users who have a mailbox in this mailbox store can only send email internally and not to any external email address?  Also, how can I configure a mailbox store to use a different SMTP Virtual Server other than the default one that's created?

Your help is much appreciated!!

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Question by:tbaik
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by:Sembee
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Restricting access to internet email is very easy.
http://www.msexchange.org/pages/article_p.asp?id=61

The article is for Exchange 2000, but the process is identical for Exchange 2003.

Your second question though, is not possible. Exchange will use the first SMTP VS that it comes to. You cannot control use of the SMTP VS and make it use another one.

Simon.
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by:Sembee
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Perhaps if you outlined what you were trying to achieve, an alternative might be possible.

Simon.
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by:tbaik
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What I'm trying to do is to restrict a group of users from being able to send/receive email via the Internet.  However, they need to be able to send/receive email internally from our organization.  I tried following the procedures posted on MSExchange but it failed and I was still able to send email out to an Internet email address (Yahoo).   Is this only for the entire organization or can I create an email domain (e.g. name@domain.int) and apply to this domain only?  
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by:Sembee
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If you read the page that I linked to, then you will see that you can control the process via a group. Being a member of that group will control their ability to send email.

Receiving email is as simple as putting an email address that isn't valid on to the account and ensuring that it doesn't have a valid external account attached. I would use domain.local instead of domain.int as .int may become a valid domain name.

My second commend above was directed at the using a separate SMTP VS for another mail store.

Simon.
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by:tbaik
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I followed the procedures exactly as listed in the article you pointed me to, but I was still able to send email to an Internet-based email address from an account that was a member of the restricted group.  I even added the registry value as stated in the KB article referred to in this article.

Regarding the domain extension, .INT was used for testing this and I will be using a different extension that will not be a valid domain name.

Regarding your second comment on the second SMTP VS, I understand it's not possible.

Thanks!!

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Sembee earned 500 total points
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These are my instructions for doing the same thing - but they are almost identical to those that I have already posted.
http://www.amset.info/exchange/restrict-internetmail.asp

Do you have a smart host on the SMTP virtual server by any chance? That can cause problem with this technique.

Simon.
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by:tbaik
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Sembee,

I played around with the configurations a bit and the reason it failed is because there was a minor procedure that I had overlooked.  My apologies for any inconvenience.  I appreciate your help with this issue.  Thank you!!

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