Exploit failed [unreachable]: Rex::ConnectionTimeout The connection with (20*********180:80) timed out [closed]

I am attending an Offensive Security lab. One of the tasks is to exploit an abandoned Zimbra mail server. In order to fullfill this task, I looked for vulnerabilities with nmap vulnscan and found:
[25775] Nginx HTTP Server 1.3.9-1.4.0 Chun… Continue reading Exploit failed [unreachable]: Rex::ConnectionTimeout The connection with (20*********180:80) timed out [closed]