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Restricting mail flow.

I have a client who would like to do something strange and I am not sure how to accomplish it.

They have 3 Exchange 2003 servers.  We will call them A, B, and C.  They are all in the same Active Directory and same Exchange Organization. Three seperate mail storage groups and three seperate stores.  They want to setup the following:

Users on Server A can email Users in Server C and vice versa.  No send/recieve to the external world.  And no send/recieve to users on Server B.

Users on Server B can email Users in Server C and vice versa.  Send/recieve to the external world is allowed.  No send/recieve to Users on Server A.

Users on Server C can email users on Server B and C and vice versa.  Send/received to external world is allowed.

I don't even know if this is possible.  Any ideas?  I can think of some stuff, but they all have the same domain name, IE @mydomain.com.  So my ideas are failing.

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daxatviyu
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daxatviyu
1 Solution
 
VahikCommented:
this is very easy...
create two groups    serverA serverB
using active directory users and computers or ADModify on each user that is located on server A click  "from everyone "
except and then ADD group serverB  ....now go to the server B and do the same except add serverA users....
u dont have to do any thing to server C users since they are free to do anything..

as far as sending and receiving is concerned.....give server A and server B users .local email address only(this will prevent them from receiving)....and then  on the smtp connector prevent them from sending.....


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