Starting November 2025, Gmail has announced that they will be ramping up their enforcement on non-compliant mail. That includes unauthenticated mail, but also senders with consistently high complaint rates.
Senders who fail to meet Gmail’s email requirements, especially around authentication and complaint rates can expect real disruptions: delayed mail, temp-fails, and even outright rejections.
The quiet period is over. If you’ve been skating by without full authentication or ignoring complaint rates, your leniency window to fix it just closed.
Here’s what to expect:
- Non-compliant mail will get blocked or deferred
- Complaint rates above 0.1% may trigger increased spam placement and even outright rejections
Minimum action this week:
- Make sure you are fully authenticated (DKIM, SPF and DMARC)
- Get your complaint rate under control
Check out our article on email compliance to make sure you are ready for this increase in enforcement.
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