SPF - Sender Policy Framework is a security tool that helps prevent email spoofing, where attackers fake emails to look like they’re from someone else (like your domain).
Here’s a simple breakdown:
How it works: SPF allows domain owners to create a list of approved email servers that are allowed to send emails on their behalf.
- Verification: When an email is received, the recipient's email server checks the SPF record to see if the email came from an authorised server.
- Blocking fakes: If the email didn’t come from an approved server, it may be rejected or marked as suspicious.
Think of SPF as a "who’s allowed to send mail" list for your email domain, helping ensure only legitimate emails get through.