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

Results for_spf.1blu.de

Resolver

Location

TXT

Name	TTL	Value
_spf.1blu.de	180	v=spf1 ip4:178.254.0.201 ip4:178.254.0.202 ip4:178.254.0.203 ip4:178.254.0.204 ip4:178.254.0.205 ip4:178.254.0.206 ip4:178.254.0.207 ip4:178.254.0.208 ~all