Hi!! I have joined two sites located in two countries through a site connector. Site A (Country A) has 6 servers and Site B (Country B), 4 servers. We use the following configuration in that connector : Site A * Site Servers Server01 Server02 * Target Servers Server02 Cost =1 Server03 Cost=1 Site B * Site Servers * Target Servers Server04 Cost =1 Server05 Cost=1 Server06 Cost =1 Server07 Cost=1 Server08 Cost =1 Server09 Cost=1 On Friday I added Server01 and Server 02 as Target Servers (Site A) because people from these servers couldn't send mail to Site B. Everything worked fine until Monday. This day, I realized, messages began to transfer slowly through queues and I checked the event viewer from my mail server, this warning appeared : Event ID 9280 : A resource limit has been reached when attempting to open an association. The locality table is full. [BASE IL INCOMING RPC 33 505] (12) Unfortunately, the server stopped to transfer messages. I increased a greater value for threshold parameter (MTA Site Configuration), but it doesn't fix it. I removed those servers which I added to Target Servers to Site Servers in Site Configurator (Site A), but the same happened, it doesn't work. So I had to stop and start MTA service and it worked properly. what could have happened? Any suggestions? Thanks, Eliana