Nmap scan report for 172-236-115-198.ip.linodeusercontent.com (172.236.115.198)
Host is up (0.18s latency).
Not shown: 95 closed tcp ports (reset)
PORT    STATE SERVICE
25/tcp  open  smtp
80/tcp  open  http
443/tcp open  https
465/tcp open  smtps
587/tcp open  submission

Nmap done: 1 IP address (1 host up) scanned in 1.40 seconds