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

Results for_auth.messagegears.net

Resolver

Location

TXT

Name	TTL	Value
_auth.messagegears.net	300	spf2.0/pra ip4:135.84.216.0/22 ip4:66.240.227.0/24 ip4:63.143.59.128/25 ip4:63.143.57.128/25 ip4:216.98.158.0/24 ip4:74.63.212.0/24 ip4:52.200.59.0/24 ip4:34.245.210.0/24 -all