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

Results for_block2.maropost.com

Resolver

Location

TXT

Name	TTL	Value
_block2.maropost.com	3600	v=spf1 ip4:64.78.0.0/18 ip4:69.10.229.0/24 ip4:162.216.192.0/22 ip4:162.244.196.0/24 ip4:185.64.213.32/27 ip4:185.64.213.96/27 ip4:199.193.200.0/21 ip4:205.217.20.0/24 ip4:206.40.48.0/24 ip4:206.225.164.0/22 -all