Google Postmaster Tools: What’s Changing After September 2025

Google has announced major changes to Postmaster Tools (PMT), effective September 30, 2025.

If you rely on PMT for monitoring Gmail delivery, reputation, and performance, here’s a breakdown of what’s changing, what’s staying, and what you should do to prepare.

Key Changes at a Glance

Here are the main changes you should be aware of:

• The old Postmaster Tools interface (v1) will be retired on September 30, 2025.
• The new Postmaster Tools (v2), launched in 2024, becomes the default interface.
• The Domain and IP Reputation dashboards have been retired. They will not exist in v2.
• Google will introduce new dashboards with “more useful and actionable information.”
• The current v1 API will also be retired once the v2 API launches (end of 2025).
• Migration to the new v2 API will require code updates, as the data schema has changed.

What’s going away

In addition to the new changes, Google has confirmed the following features will be retired:

• Domain Reputation dashboard
• IP Reputation dashboard

These were often misunderstood, and Google has confirmed that it will no longer share “reputation scores.”

Instead, the focus will shift to actionable signals, such as compliance, authentication, delivery, and engagement (exact new dashboards will be announced soon).

What’s staying

Here’s what you can still rely on going forward:

• Spam complaint rate
• Authentication reports (SPF, DKIM, DMARC)
• Delivery error data
• Feedback loop information

What This Means for Marketers & ESPs

These updates change the way senders should think about Gmail deliverability and performance. Instead of relying on reputation scores, the focus is moving toward measurable behaviors, compliance, and user engagement.

• No more “high/bad” reputation scores. Gmail wants senders to prioritize bounces, spam complaints, engagement, and authentication.
• Reputation will still play its role. While dashboards are no longer available, Gmail will continue to use reputation signals internally. Reputation-related feedback will still appear in SMTP error logs.
• Prepare for API migration. If you’ve integrated PMT data into dashboards or reports, you’ll need to update your code once the v2 API launches.
• Compliance becomes more visible. Gmail is placing greater emphasis on whether your setup meets the requirements for bulk senders.
• Engagement is the true health signal. Recipient actions (complaints, opens, clicks, deletions) will be the best indicators of sender performance going forward.

What You Need to Do

To stay prepared and avoid disruptions, here are the steps to focus on:

• No immediate action is required: After September 30, 2025, all users will be automatically redirected to Postmaster Tools v2.
• Plan your API migration early: If you rely on the API for dashboards or reporting, start reviewing your setup now. Google will release documentation later this year, so be ready to update your code once the v2 API becomes available.
• Double down on sending best practices: Keep spam complaints low, maintain bounce rates below 2–3%, and make sure every sending domain is fully authenticated with SPF, DKIM, and DMARC.

Looking Ahead

Google has confirmed that they’re exploring new dashboards to replace reputation scores. We’ve shared feedback with Google to include engagement metrics (positive and negative user interactions) to give senders more actionable insights.

At Moosend, we’ll continue to monitor these changes closely and help you adapt. Stay tuned, as we’ll update you as soon as more details are released.