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We have some products that generate unauthenticated e-mails that need to go to internal users who are not allowed to receive e-mail from outside of our organization. &nbsp;Typically the way to block some users from receiving e-mail from the outside is to only allow e-mail from authenticated users. &nbsp; &nbsp;If we take off the authenticated users only restriction they can receive these e-mails but then they get all of the outside e-mail as well.<br />
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I already use a distribution list and a transport rule to keep these users from sending e-mail to the outside. &nbsp;I tried creating Transport Rules to block members of the internal e-mail only distribution group from receiving e-mail from outside the organization so I could allow unauthenticated internal e-mail but it doesn't appear to work. &nbsp;Is there a way to do what I need to do?
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We have some products that generate unauthenticated e-mails that need to go to internal users who are not allowed to receive e-mail from outside of our organization.  Typically the way to block some users from receiving e-mail from the outside is to only allow e-mail from authenticated users.    If we take off the authenticated users only restriction they can receive these e-mails but then they get all of the outside e-mail as well.

I already use a distribution list and a transport rule to keep these users from sending e-mail to the outside.  I tried creating Transport Rules to block members of the internal e-mail only distribution group from receiving e-mail from outside the organization so I could allow unauthenticated internal e-mail but it doesn't appear to work.  Is there a way to do what I need to do?

Can I block External e-mail while allowing unauthenticated internal e-mail in Exchange 2007?

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.