3/ Toto by mělo pomoci - nebo stačí jen u receive connectoru zrušit anonymous users?

1. open exchange 2007 console and go to "Organization Configuration" and then to "Hub Transport"
2. Select "Transport Rules" tab
3. From the "Action Pane" on the right select "New Transport Rule"
4. Type any name and any comment and press next
5. From the conditions window select "From users inside or outside my organization" and "Send to users inside or outside my organization" and from the details select the "Inside" links and switch both to "outside" then press next
6. From the "Actions" window select the last action "Silently drop the message" and press next
7. If you have any exceptions you can configure it in the "Exceptions" window ,If not just press next again
8. Press "New" then "finish"