Nmap scan report for mail.unal.edu.co (172.217.21.243)
Host is up (0.067s latency).
Other addresses for mail.unal.edu.co (not scanned): 2a00:1450:4017:819::2013
rDNS record for 172.217.21.243: fra16s13-in-f19.1e100.net
Not shown: 97 filtered tcp ports (no-response), 1 filtered tcp ports (net-unreach)
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https

Nmap done: 1 IP address (1 host up) scanned in 3.13 seconds