Email Security: SPF, DKIM and DMARC

Emails are the most common entry point for cyber attacks on small businesses. Fake invoices, email fraud, CEO fraud — it all starts with a forged sender address.

SPF

Sender Policy Framework. Defines which servers may send emails for your domain.

DKIM

DomainKeys Identified Mail. Digital signature guaranteeing authenticity and integrity.

DMARC

Domain-based Message Authentication. Policy that triggers when SPF/DKIM fail.

BIMI

Brand Indicators for Message Identification. Your logo in mail clients — trust signal.

Business risk: Without DMARC, any attacker can send emails in your company name. Your customers receive an "invoice" from you — and pay to a foreign account.

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