I want to thank you for your responses on my trouble threads. Now..if I am only opening smtp port 25 on my firewall from outside..and 443..is there any other ports I need open on the linux server? Or can I close them all down but those two? .. (and 7071). Thanks guys.
I am fairly new at linux so I am wondering CAN anyone still hack you with only 443 and 25 open? What are the vulnerabilities possible. Thank you.