Why does it matter?
DMARC enhances email security by leveraging SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) to authenticate incoming emails, reducing the risk of phishing and spoofing attacks.
To strengthen cybersecurity, Google and Yahoo implemented stricter authentication policies in February 2024, requiring email senders to align with SPF or DKIM. Organisations that fail to comply risk having their emails rejected or flagged as spam, disrupting business communication. Microsoft detail their DMARC policies here.
Additionally, starting March 2025, DMARC compliance will become a requirement under PCI DSS v4.0 for organisations handling payment transactions. This regulation mandates DMARC, SPF, and DKIM to mitigate phishing risks and ensure secure email communications.

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