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

Results for1amer.rp.oracleemaildelivery.com

Resolver

Location

TXT

Name	TTL	Value
1amer.rp.oracleemaildelivery.com	3600	v=spf1 ip4:162.88.8.0/24 ip4:162.88.36.0/24 ip4:208.76.62.0/23 ip4:216.146.32.0/23 ip4:207.211.132.0/25 ip4:165.1.100.0/25 ip4:158.247.100.0/25 ip4:136.248.224.128/25 ip4:168.129.248.128/25 ip4:192.22.96.128/25 ip4:168.129.184.128/25 ip4:192.22.160.128/25 ip4:192.22.32.128/25 ip4:157.137.96.128/25 ip4:192.22.224.128/25 ~all