You can find a server hostname by the IP address using telnet to port 25 (exim): 1) Type: telnet <IP_ADDRESS> 25 2) Type: HELO [ENTER] Note: On some mail servers,
You can find a server hostname by the IP address using telnet to port 25 (exim): 1) Type: telnet <IP_ADDRESS> 25 2) Type: HELO [ENTER] Note: On some mail servers,