SPF testing methods

SPF (Sender Policy Framework) testing methods verify if an email claiming to come from a domain is authorized by its domain owner. The process involves checking the DNS records of the domain to see if the sending mail server's IP address matches the list of approved servers specified in the SPF record. Testing can be done manually by querying DNS records or through specialized tools that simulate email sending. These methods help detect email spoofing and ensure that messages are legitimately from the claimed sender, reducing spam and phishing risks.