What is SPF?
Why is SPF Important?
What exactly is DKIM?
Why is DKIM important?
- An email’s content has not been altered.
- The email’s headers haven’t changed as the original sender sent them.
- The email’s sender owns or approves the domain’s owner to use the DKIM domain.
What is DMARC?
- None: Treat all mail sent from your domain as if DMARC hadn’t validated it.
- Quarantine: The receiving server may accept the message, but it should be delivered to a location other than the recipient’s inbox (usually, the spam folder)
- Reject: The message is completely rejected.
How SPF, DKIM & DMARC are related?
- SPF: Senders can use SPF to specify which IP addresses are allowed to send mail for a specific domain.
- DKIM: It gives an encryption key and a digital signature that ensures an email message was not faked or tampered with.
- DMARC combines SPF and DKIM authentication protocols into a single framework, allowing domain owners to specify how an email from their domain should be handled if an authorization test fails.