Business Email Security: Protecting Against Phishing and Spoofing

Business email compromise starts with a message that looks like it came from someone you trust — a vendor, a colleague, or your own domain. Spoofed emails trick employees into wiring money, sharing credentials, or clicking malicious links.

Three DNS records help protect your domain:

- SPF (Sender Policy Framework) lists which mail servers are allowed to send email for your domain.

- DKIM (DomainKeys Identified Mail) adds a digital signature so recipients can verify the message was not altered in transit.

- DMARC tells receiving mail servers what to do when SPF or DKIM fails, and sends you reports about spoofing attempts using your domain.

Without all three, attackers can send email that looks like it came from your address. With them configured correctly, most spoofed messages are rejected before they reach an inbox.

Pair DNS protections with MFA and employee training. Technology catches most attacks, but human vigilance catches the rest.