Using Exchange 2000 server on a Windows 2000 environment.
I just moved my external e-mail in-house. My ISP used to be the host.
Changed the MX records - OK; opened the 25 port on my firewall-router 3COM - OK…. Everything went OK.. Can receive and send but we’re not able to receive from some people (one or two). And we cannot send to AOL e-mail addresses.
When I set up my firewall to open port 25, I also open POP3 maybe this was wrong?...