[SOLVED]Cannot connect to SMTP remotely

[kilburn]

No, postfix it's not blocking outside connections in your case because netstat shows that it is listening on all interfaces. Even if it was refusing connections, these tries should show up in your mail.log, and according to your previous post there are no connection attemps shown there (you pasted imap-related log lines, not postfix related ones).

Moreover, as the "nc" test you made didn't show anything on the server terminal, I can assure you that there's something blocking the incoming network connections through port 25. It may be a local firewall or the ISP, but surely something is blocking these connections...