Ok, no worries. Was the firewall enabled when you installed Exchange? It should be. Re-enable it and try again.
Is there any 3rd party software installed? Are the receive connectors enabled? and no one changed the config?
I'm unable to telnet port 25 in windows server 2016 that has exchange 2016 installed.
I can telnet port 25 in another server running other exchange in the same network, but for this one am unable.
Windows firewall is disabled.
In edge Firewall the port is allowed.
I checked with netstat command for listening, and its showing listening
Outgoing traffic for that port is open, for example if run, telnet smtp.gmail.com 25, it returns well.
When i telnet localhost or 127.0.0.1, the IP of the server or the FQDN of the server, i get an error. Connection to host lost
What could be issue.