📩 The biggest sending change in a year

Opener bloat is lying to you

This one is going out later than usual.

I wanted to get it out because it covers the biggest change I have made to my sending strategy in over a year. Not a tweak. An upgrade. The biggest change to how I define a "sendable" subscriber since I first built the framework.

Here is what forced it.

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The pattern I could not unsee

Reviewing client accounts and our own newsletters, the same thing kept surfacing.

Subscribers the ESP reports as "opening." Month after month. Sometimes every single send. And they have never clicked. Not one link. Ever.

A year ago, that open was enough to keep them in the sending pool. It looked like engagement. It counted as engagement.

Not anymore.

I call this opener bloat, and once you know how to look for it, you will find it in every list you touch.

Why an open without a click is not a person

In 2026, an open with no click behind it usually is not a human decision. It is infrastructure.

It is Apple's Mail Privacy Protection auto-firing your tracking pixel whether the subscriber looked at your email or not.

It is image prefetching, loading your pixel before anyone touches the message.

It is a security scanner doing its job, opening your email so an employee does not have to.

Every one of those registers as an "open" in your dashboard. None of them is a reader. You are sending to machines and calling it engagement.

And here is the part that costs you. Mailbox providers can tell the difference even when your ESP cannot. When a growing share of your volume goes to addresses that never generate real human signals, your sender reputation absorbs the damage.

The bloat is not neutral. It is dragging down inbox placement for the subscribers who actually want your email.

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The upgrade: one rule

The fix is not complicated. It is one rule, applied past the new-subscriber grace window:

An open only keeps you in the sending segment if you have also clicked. Ever.

That is it. One click, at any point in your history, and your opens count as evidence of a human.

Walk through what that does.

New subscribers still get runway. The grace window protects them while they settle in.

Recent clickers stay. Obviously.

Openers with real click history stay. They have proven there is a person behind the pixel, so their ongoing opens mean something.

The long-tenured, open-only ghost? Gone.

What is left is the whole point

What survives this filter is a list measured by behavior that requires a human on the other end.

That is not a smaller list for the sake of being smaller. It is engaged audience density, the share of your list that is demonstrably alive.

An open tells you a server fetched an image. A click tells you a person made a decision.

I am building around the second one. You should be too.

So this week, pull your active sending segment and isolate the subscribers who have opened repeatedly but never clicked, past their grace window. Look at how many there are. Then run the one rule against them and watch what happens to your engaged density. Reply and tell me what share of your "engaged" list turned out to be machines.

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