Sender Policy Framework (SPF) Explained
The Sender Policy Framework (SPF) is a procedure to prevent the forgery of email addresses. In other words, it allows email receivers to verify if the sender is allowed to send emails from your domain. To protect a domain, the domain owner publishes a list of authorized email systems via his DNS system.
To understand the benefit of SPF, imagine the following scenario:
You receive an email from john@example.com. The email was sent from a server named mail.spammer.com.
When receiving the email,