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Block external email commuication in exchange environment.

How can I block user from sending email outside of our domain  and receiving email.from external domain. I am using exchange server 2003 enterprise edition on windows server 2003 sp1.
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alkadrya01
Asked:
alkadrya01
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1 Solution
 
aprilmjCommented:
remove their smtp ID within AD users and groups for Exchange.

1) open AD users and groups and find the user...
2) go to email addresses
3) remove the JUST the smtp address

-aprilmj
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SembeeCommented:
The remove SMTP address method doesn't work for Exchange 200x servers as Exchange uses SMTP for internal routing.
You need to be a little more clever with restrictions on the user account to allow internal email to work correctly.
http://www.amset.info/exchange/restrict-internetmail.asp

Make careful note of the KB article I refer to in that article about a possible registry change that is required.

Simon.
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aprilmjCommented:
I've done it without issue with 3 backend and 1 frontend server.  I have no email delivery issues with a single site, single domain model.  And it sounds like he has *one* server, so the cross-server delivery issue isn't in play here.

Generally the MS delivery object is sufficient to provide a path for email.

-aj
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SembeeCommented:
The major issue you get is when you have users sending email by SMTP internally, or you have users entering the full email address for internal addresses (where they know that all users are firstname.lastname@ domain.com for example). You will also get issues with distributions lists in certain scenarios. You should not remove SMTP addresses from user accounts. While it may have worked for you without any apparent issues that does not mean it is the correct thing to do.

Simon.
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winperezCommented:
Hello, If I create an SMTP connector so I can block certain users from sending/receiving emails from the internet, will this affect other users? Does the SMTP connector applies to everyone in my organization? What about if I create one, then I decide I don't wan to use it, will this cause problems with my Exchange? Thank you for your response.

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SembeeCommented:
winperez - this is an old question. Unlike a forum, it is not possible to "bump" questions. Therefore I would suggest that you ask your question fresh so that other experts will see and answer your question.

Simon
Exchange Server Zone Advisor.
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winperezCommented:
this question was never resolved
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