Why Your Email List Stopped Opening

Open rates falling is the symptom. The cause is either deliverability, relevance, frequency or the list itself, and they need different fixes.

Start with deliverability, because it invalidates everything else

If your emails are landing in spam or promotions, no amount of better writing helps.

Check your authentication. SPF, DKIM and DMARC records on your sending domain. The major providers tightened their requirements and senders who never set these up properly saw delivery fall off a cliff. This is a technical fix, it takes an hour, and it is the first thing to rule out.

Check your sending reputation. Hard bounces and spam complaints damage it. A list that has not been cleaned in two years is full of dead addresses, and sending to them tells the provider you are not maintaining your list.

Check whether you changed something. New platform, new sending domain, new template full of images. Any of those can move you into a different folder overnight.

Send yourself a test to accounts on the main providers and see where it lands. Simple, and almost nobody does it.

Then look at relevance

People signed up for a reason. If what you send stopped matching that reason, they stop opening without ever unsubscribing.

Look at what you sent when the opens were high, and what you send now. The drift is usually from useful to promotional. A list built on "we send you something helpful monthly" and now receiving weekly offers behaves exactly as you would expect.

The fix is to go back to what they signed up for, and to earn the promotional emails with the useful ones.

Then frequency

Both directions cause it.

Too often and people tune out. The email becomes furniture.

Too rarely and they forget who you are. A list emailed twice a year opens badly because the sender is unrecognised, and unrecognised senders get deleted.

Monthly is the floor for most businesses. Weekly works when you have something worth saying weekly.

Then the list itself

Where did these people come from? A list from a competition entry, a bought list, or a lead magnet unrelated to what you sell will always open badly. That is not a fixable email problem.

How old is it? Addresses decay. People change jobs. A five-year-old list is substantially dead and its dead portion is dragging your reputation down.

The clean-up

This is the thing that makes the biggest difference and the thing everyone resists, because the list gets smaller.

Segment out everyone who has not opened in six months. Send them one re-engagement email that is honest: we noticed you have not opened anything, tell us if you want to stay.

Then remove everyone who does not respond.

Your list shrinks and your open rate, your deliverability and your actual results all improve, because you are now sending to people who want it. A list of 800 engaged addresses outperforms 4,000 mostly dead ones, and it costs less.

The subject line question

Everyone starts here and it is rarely the problem.

Subject lines matter at the margin. They do not explain a drop from forty percent to twelve. If everything else is right, then test subject lines, and expect single digit percentage improvements rather than a rescue.

One caution on open rates

Open tracking has become unreliable, because some providers pre-load images and register an open that never happened, while privacy settings hide real ones.

Which means a drop in reported opens is sometimes a measurement change rather than an audience change. Watch clicks and replies alongside it, because those are the numbers that still mean something.