Rejecting Incoming Mail

[Olster]

Currently in Exchange 2000 under our connector we are rejecting all messages and have certain people who are in the accept messages from list.
This works fine as users are rejected from sending external mail and so can only communicate internally. The problem is they can receive external mail.

Can Exchange 2000 do the same on receiving mail as sending. Is there a setting that rejects all external messages except for the following internal addresses or users.

 

[dmcabs]

Do you have it behind a firewall? ISA with FeaturePack1 installed should do the trick nicely and give you solid protection.
Hope this helps...

Dave

 

[Olster]

Unfortunately the server does not run ISA.

I found a Microsoft article 247121 which shows a way around the known problem of not being able to block incoming mail to users in Exchange 2000. It does say this was possible in Exchange 5.5 but in Microsofts wisdom they decided not to include it in Exchange 2000. REAL BRIGHT. The workaround is below.
To restrict users from receiving Internet mail in Microsoft Exchange 2000 you need to create two SMTP addresses, for example user@microsoft.com and user@microsoft.local. This is done using Exchange 2000 recipient policies. Assign the microsoft.local address to all users and the microsoft.com address to only the users who are allowed to receive Internet mail. This allows all users to receive internal mail, but does not allow specific users to receive Internet mail since the microsoft.local address is not an allowable Internet mail address.

The one thing that really peeved me was the instructions fail to say make sure you go to the users properties in AD that will be getting outside mail and untick inherit recipient policy and make sure their smtp address is the .com version. It also fails to say that you pretty much have to reboot the box to make the changes effective. No re-starting the services did not work.

It hasn't worked correctly so further testing will be needed to determine if it will work at all.

Ol