What is a Sender Policy Framework Record?
Proof that you are a legit sender
Many customers use a custom sender email (e.g. admin@brainpuzzles.com) to send campaigns from tinyAlbert. So here's a question: how does the email service provider on the recipient's end (e.g. Gmail or Yahoo) know that tinyAlbert has permission to send emails with your custom domain attached to the message?
The answer is a small file called Sender Policy Framework, or SPF for short. If you send campaigns with a custom sender address, you should take five minutes and create an SPF record.
Let me explain the purpose of an SPF record with an analogy.
Let's say you're expecting a package from a friend. One day, a suspicious delivery guy walks up to your door and rings the bell. You're not sure if this is your friend's package or an imposter. So you call your friend, get a description of the package and the name of the delivery service. You confirm the delivery is legit, open the door, and accept the package. Everything is cool.