It can be anything! An apex, subdomain, or even a URL.

Results formx2.firewall.workcloud.tech

Resolver

Location

A

Name	TTL	Value
mx2.firewall.workcloud.tech	300	65.109.131.140Hetzner Online GmbH

Name	TTL	Value
mx2.firewall.workcloud.tech	300	0 mx2.firewall.workcloud.tech

Name	TTL	Value
mx2.firewall.workcloud.tech	300	v=spf1 a a:mx1.firewall.workcloud.tech a:mx2.firewall.workcloud.tech ip4:5.78.108.206 ip4:5.78.28.115 ip4:37.27.8.39 ip4:65.109.131.140 ip6:2a01:4f9:3a:26c1::2 -all