Yeah, you read it right. It is 2022, and people still don’t know how to configure the Sender Policy Framework record for their domain names. For those who don’t know, SPF is an authentication mechanism standardized in April 2014, which makes it possible to verify the sender of an email. The verification procedure is pretty simple: the receiving side looks up the SPF record of the sender’s domain name and determines if the originating IP address is allowed to send an email on behalf of that domain.