Hi All, I have a setup of exchange 5.5 SP 4 and Proxy Server 2.0. My MX record is pointing to IP of external network card of proxy server. I am using IMC in exchange 5.5. I am able to send the mails but I am not able to receive a single mail, but if I re-start IMC some time it starts receiving mails. 1. WSP client is installed on exchange server 2. I can telnet to port 25 of exchange server. 3. WSPCFG.INI files is there in exchange server. 4. Winsock Proxy is working properly. 5. No filtering is enabled so if some body can tell me what else I have to do, in this case. I am planning to re-install IMC once again. Thanks, Vijay