Sender Policy Framework (SPF)

The SPF protocol allows email systems to authenticate authorized mail servers, preventing unauthorized use of an organization's domain for email delivery.

Authorization for email delivery requires the addition of a TXT record to the domain's DNS settings through the registrar of record. (e.g., GoDaddy, Bluehost, Namecheap)

Users managing multiple SPF authorizations should insert new TXT entries on separate lines to ensure each record is recognized independently by receiving mail servers.

DNS changes typically require up to 48 hours for full propagation to resolve before the new configuration becomes active.