Why Google and Yahoo Now Require DMARC

In 2024, Google and Yahoo introduced strict new requirements for bulk senders. If you send more than 5,000 emails a day, DMARC is no longer optional.

The New Requirements

To curb spam and phishing, the major inbox providers now enforce three key rules:

1. Authenticate Your Email: You must have SPF and DKIM set up, and you must have a DMARC policy in place.
2. Keep Spam Rates Low: You must keep your reported spam rate below 0.3% (ideally below 0.1%).
3. One-Click Unsubscribe: Marketing emails must support easy, one-click unsubscription headers.

Why This Matters for Everyone

Even if you don't send 5,000 emails a day, these changes signal a shift in the industry. "Best practices" are becoming "mandatory requirements." Domains without authentication are increasingly likely to land in the spam folder, regardless of volume.

DMARC: The Critical Component

Setting up a DMARC record is the most technical hurdle for many businesses. It requires:

• Publishing a TXT record in your DNS.
• Setting a policy (at least p=none is required for compliance).
• Monitoring reports to ensure legitimate email isn't being blocked.

How SentraDMARC Helps

We built SentraDMARC specifically to solve this problem. Our platform makes it easy to generate the correct DMARC record, monitors your compliance status, and alerts you if your spam rate spikes or authentication fails.