Beginning November 2025, Gmail is taking a firmer stance on bulk senders who don’t follow its authentication and consent requirements. What used to be a set of best practices is now a matter of enforcement, and senders who fall short may see mail deferred, spam-foldered, or outright rejected.
This move isn’t about changing the rules. It’s about holding senders accountable for following them, particularly around identity, authentication, and permission.
What’s Changing
Google quietly updated its Email Sender Guidelines for Bulk Senders this week, adding an explicit enforcement timeline and stronger language around non-compliance.
“Starting November 2025, Gmail is ramping up its enforcement on non-compliant traffic. Messages that fail to meet the email sender requirements will experience disruptions, including temporary and permanent rejections.”
The policy applies to anyone sending 5,000 or more messages to Gmail users within a 24-hour period.
While the technical requirements: SPF, DKIM, DMARC, TLS encryption, and valid reverse DNS remain the same, Gmail is sharpening its focus on compliance.
Consent Is No Longer Optional
At beehiiv, we’ve long required customers to send only to subscribers who have provided affirmative consent, meaning permission that is freely given, specific, informed, unambiguous, and obtained through a clear affirmative action, in line with applicable privacy and data protection laws.
Google’s new enforcement underscores this same principle. Sending to contacts where consent is ambiguous, or whose addresses were obtained through third-party sources, may likely no longer pass the test. Gmail’s filtering systems increasingly distinguish between truly opted-in recipients and those who never directly agreed to hear from you.
What Senders Should Do Now
Audit Your Lists
Remove any contact whose consent you can’t verify. Only retain subscribers who clearly opted in to your publication.Strengthen Authentication
Ensure SPF and DKIM pass and align with your domain, publish a valid DMARC record, and confirm TLS is enforced for all outbound mail.Verify Domain Alignment
Make sure your authenticated domains (SPF, DKIM, and “From” domain) align. Misalignment can cause rejections under Google’s new enforcement.Monitor Spam Complaints and Delivery Patterns
Keep Gmail complaint rates below 0.1%, and monitor for soft bounces (4xx) or rate limits that may signal enforcement issues.Segment and Sunset Inactive Contacts
Remove or suppress subscribers who haven’t engaged recently to maintain a healthy, engagement-based list.Review Frequency and Cadence
Maintain a predictable sending schedule that aligns with subscriber expectations. Irregular or overly aggressive frequency can contribute to filtering and higher complaint rates.Be Transparent in Messaging
Use clear subject lines, an identifiable “From” name, and content consistent with what subscribers expected when they signed up.
The Bottom Line
Google’s new enforcement initiatives doesn’t introduce new concepts, it simply reinforces what senders should already be doing.
Their message is simple: authentication, alignment, and affirmative consent are now table stakes.
For senders who’ve built trust with their subscribers and respect permission, little will change. But for those relying on gray-area lists or questionable acquisition practices, enforcement very well may impact your deliverability metrics and inbox placement.
