Email metrics are changing

The AI Inbox Is Here. How It's Changing Your Open Rates.

What Australian marketers need to know right now

Australian subscribers open emails at a rate of 46%, one of the highest in the world. But in 2026, that number needs a second look.

Google, Yahoo, and Microsoft have all added AI directly into the inbox. These tools are changing how emails get shown, summarised, and read, and as a result, the numbers in your campaign reports may no longer mean what you think they do.

What is Happening in the Inbox

Google

Google now uses AI to read every email, write a short summary, and decide which messages are most important to show first. About one in three Australian email recipients uses Google, so this is already affecting a large portion of most lists.

The problem: when Google's AI reads your email to create a summary, it triggers your open-tracking tool, recording an open even though no real person read the message. People can also get your key information straight from the summary without ever clicking into your email.

Yahoo Mail

Yahoo shows a one-line AI summary next to each email so subscribers can see what it is about without opening it. A swipe feature on mobile lets people flick through their entire inbox in seconds via summaries. The same open-rate problem applies here.

Microsoft Outlook

Outlook now scores every incoming email for importance and pushes lower-priority messages down, so they are seen less often. In government, education, healthcare, and corporate Australia where Outlook is widely used, this is already changing which emails get noticed.

What This Means for Your Results

Open rates are being inflated

Open rates are going up, but not because more real people are reading your emails. AI tools are triggering your tracking when they scan emails to write summaries. A campaign showing 50% opens in early 2026 is almost certainly not being read by 50% of your list.

Click rates are falling

While opens look healthy, the number of people clicking through is dropping. If someone can get the key message from an AI summary, they have no reason to click into the email. For promotional campaigns and newsletters, this is a direct hit to results.

Up to 40% of emails are being buried

Research suggests up to 40% of emails that land in Google inboxes are being pushed to low-visibility spots by AI. An email can pass every check and still be effectively invisible if the AI decides it is not a priority for that person. It is no longer just about avoiding spam.

More people are unsubscribing

Google and Yahoo have made unsubscribing much easier, with a one-click option now visible right in the inbox. Unsubscribe rates have nearly tripled since 2024. Lists are shrinking faster than before.

What to Do About It

• Stop using open rate as your main measure of success. Focus on clicks, purchases, and sign-ups instead, as these reflect real people engaging.
• Put your best message up front. AI reads the first few lines to write its summary, so your opening sentence needs to clearly state what is in it for the reader.
• Keep your list clean. Subscribers who have not engaged in three to six months are hurting your sender reputation with these platforms. Remove them or try to re-engage them. Sender reputation is essentially your track record as an email sender, and AI systems use it to decide how prominently to display your emails.
• Send your most important campaigns to your most active subscribers first.
• Check your email authentication is set up correctly. SPF, DKIM, and DMARC are behind-the-scenes settings that prove to inbox providers that your emails are genuinely coming from you. Think of them as your email's identity credentials. All three AI inbox platforms use these to decide how much to trust your messages, and gaps in any of them will hurt your deliverability, meaning fewer of your emails will reach the inbox at all.
• If your open rates have crept up recently but clicks and sales have not moved, AI summarisation is likely the cause. Do not let a flattering number mislead you.

How Prodocom Is Staying Ahead

Behind the scenes, Prodocom has been developing a new algorithm specifically designed to respond to the rise of AI in the inbox. This is not a minor update, it is a fundamental rethink of how we measure and protect campaign performance in an AI-filtered world.

Because Prodocom sends large volumes of email every hour on behalf of our clients, we see trends as they happen. When Google Yahoo, or Microsoft changes the way it handles messages, we see the effect across thousands of campaigns in real time, often before it shows up in industry research. That volume gives us something most platforms do not have: early warning.

That early warning feeds directly into our algorithm. When we detect a shift in how AI systems are treating email, we can adjust how we send, how we report, and how we advise clients before the impact has a chance to damage campaign results. It means your campaigns benefit from what we are learning across the entire platform, not just your own data.

In practical terms, this means cleaner data in your reports, smarter send strategies, and a platform that is actively adapting to protect your results as the inbox environment continues to change.

The Bottom Line

Australian subscribers are still among the most active email users in the world. What has changed is that there is now an AI sitting between your email and the person you sent it to, deciding what gets seen and when.

The Prodocom team is already working to get ahead of this, building new tools to separate genuine human opens from AI-triggered ones and updating your reporting so the numbers you see reflect what real subscribers are actually doing.

The marketers who adapt quickly, focusing on real engagement and keeping clean lists, will find email remains their strongest channel. Those who keep chasing open rates alone will be measuring a number that no longer tells the whole story.

If you would like to understand how these changes are affecting your results, reach out to the Prodocom team. We are here to help you stay ahead.