Performing a basic port scan (nmap -F blackshield.capital)
Nmap scan report for blackshield.capital (45.55.46.101)
Host is up (0.064s latency).
rDNS record for 45.55.46.101: mail.blackshield.capital
Not shown: 91 filtered tcp ports (no-response)
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
80/tcp open http
110/tcp open pop3
143/tcp open imap
443/tcp open https
587/tcp open submission
993/tcp open imaps
995/tcp open pop3s
Nmap done: 1 IP address (1 host up) scanned in 4.61 seconds