About SPF lookup
What is an SPF lookup?
An SPF lookup is a request for the SPF record of a domain name. The SPF record is a specific TXT record that is used to indicate which IP addresses (servers) are authorized to send mail on behalf of the domain name. This is used to prevent spoofing.
This tool can be useful to confirm whether a DNS change has been made correctly, or if you want to know the SPF record of a domain name.