Your Emails Are Getting Read by AI Before They Get Read by People

We'll admit it, we've spent more time than we'd like to count agonizing over email subject lines. The clever one, the curious one, the one with the emoji. Turns out a growing number of those emails might never get opened at all, because the inbox is starting to answer for itself.

In September, Google expanded AI Overviews in Gmail search to paid users around the world with Gmail set to English, after launching it in the US first. Instead of scrolling through a list of results, someone can type a plain question like "when is my next appointment" and get a short summary pulled from their emails. Gmail had already added automatic thread summaries earlier this year, so this is the next step in the same direction.

It's still limited to people on paid plans, so it's not every inbox yet. But it's a clear signal of where email is headed, and it changes what a good email looks like.

Here's the shift. When AI summarizes a message, it pulls out the core point and drops the rest. A vague subject line, a teaser hook or a big reveal buried in paragraph four doesn't survive that trip. What survives is the clear stuff: who you are, what you're offering, the date, the price, the ask.

That's honestly good news for anyone who writes like a person. The emails that do well in a summarized inbox are the ones that were already respectful of the reader's time. Put the point in the first line. Use real names for real things, like the event, the product and the deadline. Write subject lines that tell someone what's inside instead of daring them to guess.

For marketing teams, this is a good week to pull up your last five campaign emails and ask one question: if an AI had to explain this to a busy person in one sentence, would it get it right? If the answer is "probably not," the AI isn't the problem. The email is.