Our guide to navigating Microsoft’s new DMARC requirements
Microsoft has joined Google and Yahoo in enforcing stricter email sender requirements to combat phishing, spam, and spoofing. These new rules ensure that only authenticated emails from trusted senders reach inboxes, and don’t land in Junk folders.
Starting May 5, 2025, Microsoft will begin rejecting emails from high-volume senders (sending 5 000+ messages/day) that don’t meet the new requirements.
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Gain a better overall understanding of Microsoft’s bulk sender requirements and how to comply.
To help navigate Microsoft’s new DMARC requirements & make business compliance easier, this guide expands on:
New mandatory email rules from Microsoft
If you send bulk emails to Outlook.com and similar addresses, you need to know about their new authentication requirements.
Why your email delivery is at stake
Get a better understanding why non-compliances could mean your messages don't reach their intended recipients.
Additional email hygiene recommendations
Understand Microsoft's latest guidelines for email senders and implement strategies for better delivery and stronger trust.
Don’t let non-compliance get in the way of your
email deliverability and business success.
Proactive compliance with Sendmarc
Sendmarc is a leading DMARC provider that ensures every email sent from your domain is correctly authenticated, boosting email inbox delivery. We protect your brand from the reputational and financial damages of a successful impersonation, phishing, or spoofing attack.
With us, you’ll gain full visibility and control of your email traffic, continuous protection against cybercriminal targeting, and proactive monitoring of your email ecosystem. Our user-friendly platform is built to support you on your journey to protection and compliance, providing peace of mind that every email bearing your brand name is the real thing.
