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

Results for_internal._spf.mail.ovh.net

Resolver

Location

TXT

Name	TTL	Value
_internal._spf.mail.ovh.net	3600	v=spf1 ip4:178.32.122.253 ip4:46.105.76.146 ip4:46.105.49.205 ip4:46.105.57.216 ip4:51.254.194.161 ip4:51.254.194.162 ip4:51.254.194.163 ip4:51.254.194.164 ip4:51.254.194.165 ip4:5.135.97.112/28 ip4:192.99.77.81 -all