We recently reached our 16GB limit on our exchange 2000 standard server.
I created another information store on a seperate server and moved 50% of the users.
All external emails are sent and received sucessfully by users on both email servers A & B.
Server A can successfully send emails to server B. Server A however cannto recieve internal messages from server B.
I have tried smarthosts, DNS, Permission, Winroute, Member server authentication. I believe it is a product called Trend Micro Interscan Message Securtiy Suite that is blocking messages from server B to server A. Trend interscan is installed on our original mail server (A)