Hi,
I recently installed Exchange Server 2013 in my organization. This is our first exchange server. I installed and configured server using instructions from technet. The problem is that exchange server is not receiving mails from internet. I am able to send and receive mail inside organization and to send mail from organization to external recipients.
Exchange server is behind Firewall and NAT, and i'm using SMTP port mapping from firewall WAN IP to the internal server IP.
When i telnet to server on port 25 from outside of organization, server normally responds.
Any clues what might be the problem ?