Nmap scan report for bl-in-f26.1e100.net (142.251.16.26)
Host is up (0.055s latency).
Not shown: 98 filtered tcp ports (no-response), 1 filtered tcp ports (net-unreach)
PORT   STATE SERVICE
25/tcp open  smtp

Nmap done: 1 IP address (1 host up) scanned in 2.71 seconds