I am unable to receive mail from my ISP. My logs show an Etern message being sent, but
no mail is being returned. When I try to telnet onto port 25 from inside the network
it works OK, however if I telnet from outside the network it fails. I tried shields up from www.grc.com and port 25 is in stealth mode. I have reloaded Exchange, RAS, and Proxy. What else should I try. What can block Port 25.
