We just setup a new SBS 2008 server and I have an issue that I just can't seem to track down. The Internet Receive Connector seems to accept connections from some mail servers (ip addresses) and not from others. Example: I can't telnet to port 25 from some locations but not from others. The receive connector is setup to accept from 0.0.0.0-255.255.255.255 I would think that would cover everything. Anyone with some suggestions would be great.
Thanks in advance