Starting May 5, Microsoft will require DMARC.

Check if your domain is compliant.

The Skysnag Blog

Microsoft introduces new email sender requirements for Outlook. Ensure SPF, DKIM, and DMARC compliance by May 2025 to maintain deliverability and protect against spoofing and phishing threats.
April 3, 2025

Microsoft’s New Email Sender Requirements: What You Need to Know

Effective May 5, 2025, Microsoft Outlook will begin enforcing enhanced email authentication requirements for high-volume senders. Organizations must implement SPF, DKIM, and DMARC to ensure compliance, maintain email deliverability, and protect against phishing and spoofing. This article outlines the key changes, timelines, and how Skysnag can support a seamless transition.

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