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

Results for_spf.strato.com

Resolver

Location

TXT

Name	TTL	Value
_spf.strato.com	3600	v=spf1 ip4:81.169.146.128/25 ip4:85.215.255.0/24 ip6:2a01:238:20a:202::0/64 ip6:2a01:238:400::0/48 ip4:81.169.144.153 ip6:2a01:238:20a:202:50ff::153 -all