Email authentication is the foundation of deliverability. Without SPF, DKIM, and DMARC, your emails are likely to end up in spam.

SPF (Sender Policy Framework)

Think of SPF as the guest list for a party. It tells the world which IP addresses are allowed to send email on your behalf.

DKIM (DomainKeys Identified Mail)

DKIM provides a digital signature. It proves that the email hasn't been tampered with in transit.