How can DMARC alignment reduce domain impersonation?
DMARC alignment ensures the domain in the visible From header matches the domain authenticated by SPF or DKIM. Without alignment, attackers could authenticate their own domain while **spoofing** yours in the From header.
Alignment prevents exact **domain spoofing**. Messages claiming From: ceo@company.com must authenticate as company.com to pass **DMARC**. Attackers can't use their own infrastructure to send as your domain.
Limitations: **DMARC** doesn't prevent lookalike domains (attacker owns c0mpany.com), display name **spoofing** (fake name, different address), or subdomain abuse without proper sp= policy. Alignment is essential but not complete protection.
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