A quick overview of email authentication and why it reduces spoofing risk.
SPF and DMARC are the two most important DNS-based defenses against email spoofing.
A strong SPF policy restricts which servers can send emails on behalf of your domain.
DMARC adds reporting and enforcement so receivers can quarantine or reject fraudulent mail.
Start with p=none, monitor reports, then move to quarantine or reject for full protection.