I am at my wits end.... I have a product on Server A that uses SMTP to send notifications to end users. Server B is the exchange server. I can telnet on port 25 from Server A to Server B but cannot telnet from server B to Server A on port 25. Does this mean port 25 is open on Server A to send but not receive? If so how can I open the port without utilizing Windows Security Configuration Wizard? Or is my thought process all screwed up here? Any help would be greatly appreciated! I am sure it is easy and I am just living in Friday afternoon already.