imac> nmap -A -T4 -Pn -p 995 mail.headincohio.com
Starting Nmap 7.70 ( https://nmap.org ) at 2019-06-14 17:22 CDT
Nmap scan report for mail.headincohio.com (71.79.238.46)
Host is up.
rDNS record for 71.79.238.46: cpe-71-79-238-46.columbus.res.rr.com

PORT    STATE    SERVICE VERSION
995/tcp filtered pop3s

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 1.43 seconds

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