How do domain owners protect their reputation from spoofing?
DMARC is the primary defense against domain spoofing. It tells receiving servers to reject or quarantine messages failing authentication that claim to come from your domain. Without DMARC enforcement, attackers can freely spoof your identity.
Proper SPF and DKIM setup enables DMARC alignment. SPF authorizes which servers can send for your domain; DKIM cryptographically signs messages. Both must align with your domain for DMARC to pass.
Monitoring complements enforcement: DMARC reports reveal spoofing attempts, enabling incident response. BIMI adds visual authentication, showing verified logos that spoofers can't display. Together, these protocols protect domain reputation from impersonation.
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