I got a Server 2008 R2 x64 box. It used to be a DC, but I demoted it and removed a few roles. Everything seems fine, and all seems to work, but i cannot connect to any smtp servers. If I try to telnet on my ISP or other's that I know, it fails immediately and says it cannot connect. I checked all my settings and DNS resolves fine and I am able to ping the smtp server.
So...what am I missing and how do I fix? I really don't want to have to rebuild.