Everything is configured and 90% working. Postfix SMTP is fine. I can send mail without problem. The user on the server can receive mail without problem (mail shows in users maildir) I can telnet to the pop3 server via SSH with the following command: telnet localhost 110. When I run "telnet mail.justoutboards.com 110" via SSH, I receive the following error: " telnet mail.justoutboards.com 110 Trying 18.104.22.168... telnet: Unable to connect to remote host: Connection refused" I cannot telnet to pop3 server from outside the environment using either IP address or FQDN. Any help would be greatly appreciated.