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

Results for_spf.sm.com

Resolver

Location

TXT

Name	TTL	Value
_spf.sm.com	3600	v=spf1 ip4:122.54.11.4/30 ip4:103.154.250.0/24 ip4:202.57.56.0/24 ip4:202.57.59.0/24 ip4:218.5.98.106 ip4:58.97.162.0/24 ip4:3.1.199.90 ip4:13.213.139.62 ip4:18.138.201.142 ip4:210.176.35.180/30 -all