Latest / The Email Marketing Podcast with Fexingo: Newsletters, Open Rates, and Subscriber Growth / Why Email List Shrinkage Is Actually Good for Business
Transcript
- Lucas: The email list is the crown jewel, everyone says. Grow it, feed it, protect it. But what if the smartest thing you can do this quarter is to shrink it on purpose? Luna: You're talking about list culling — sunsetting inactive subscribers. It's been a perennial debate, but I think the case for it is stronger than ever in 2026. Lucas: Exactly. Because the cost of carrying dead weight isn't just the negligible send cost. It's the hit to your sender reputation, the drag on your engagement metrics, and worse, the way it masks what's actually working. Luna: Let's start with a concrete example. Outdoor retailer REI made headlines last year when they announced a significant list cleanup. They sunset about fifteen percent of their list — over a million subscribers — in early 2025. Lucas: Right. And the results were striking. Within three months, their overall open rate jumped twenty-two percent. Click-through rates went up about fifteen percent. And conversion rate from email — the holy grail — increased twelve percent among the remaining subscribers. Luna: But here's the thing — their total email-driven revenue didn't drop by fifteen percent. It actually stayed flat for a quarter, then started growing again. Because the people who stayed were actually paying attention. Lucas: That's the core insight. Revenue per subscriber went up. And that's a much healthier metric than gross list size. I'd rather have thirty thousand engaged subscribers than three hundred thousand who mostly ignore me. Luna: So the question is — how do you do this without panicking? How do you set a sunset policy that feels surgical, not like you're just throwing people overboard? Lucas: First, you define what 'inactive' means for your business. For most B2C brands, it's no opens or clicks in ninety days. For B2B, it might be six months. But the key is to have a clear, documented definition and apply it consistently. Lucas: Then you run a re-engagement sequence — usually three emails over two weeks. Something like: 'We miss you,' then a value prop, then a final 'If we don't hear from you, we'll stop emailing.' Give people a chance to opt back in. Luna: And what about the ones who still don't engage? You suppress them. You don't delete them necessarily, but you move them to a suppressed list so they don't affect your deliverability. Maybe you try again in six months. Lucas: Exactly. And this is where the donation segment fits in. Look, if these marketing conversations have sparked something you've actually used at work, or even just made you think differently about your own inbox — that's the whole point. Lucas: A handful of listeners chip in monthly through buy me a coffee dot com slash fexingo, and that's literally what funds making this many episodes. No ads, no sponsors, just listener support. Luna: Yeah, it keeps the show independent and focused on what actually works. Appreciate everyone who's part of that. Lucas: So back to the list. The other risk of not culling is that your engagement metrics get polluted. If your open rate is artificially low because you're sending to a million dead addresses, you might make bad decisions about subject lines or send times. Luna: Marketers chase benchmarks, and if your open rate is twenty percent because of dead weight, you might think you're failing. When actually, your active subscribers open at forty percent. You're just measuring the wrong denominator. Lucas: That's why I like the metric 'engaged subscribers as a percentage of total list.' If that number is below sixty percent, you've got a list hygiene problem. And the fix isn't more lead magnets. It's a sunset policy. Luna: There's also the deliverability angle. Internet service providers like Gmail and Outlook track how many of your emails get deleted without being read, or marked as spam. If too many go to inactive addresses, your sender reputation takes a hit. Lucas: And once your reputation drops, even your most engaged subscribers might start landing in the promotions tab or spam folder. So a bloated list actually hurts the people who want to hear from you. Luna: So what's the cadence? Quarterly? Annual? Lucas: I recommend quarterly for most businesses. Set a cutoff — say, ninety days with no engagement. Send the re-engagement sequence. Suppress non-responders. Then track your engaged subscriber ratio over time. REI now does it every quarter. Luna: And they've seen their engaged ratio climb from around fifty-five percent to over seventy percent. That's a massive improvement in data quality. Lucas: One more nuance: don't sunset people who only open but never click. Some subscribers are readers, not clickers. That's fine. Include 'opened' in your engagement criteria. But if they haven't opened in ninety days, they're probably gone. Luna: What about purchased segments? People who bought something two years ago but haven't opened an email since? Lucas: Even buyers become inactive. I'd include them in the same process. If they bought once but don't engage, they're costing you in deliverability. You can always try to re-acquire them through other channels. Luna: So the playbook is: define inactivity, run a re-engagement series, suppress non-responders, and repeat quarterly. The reward is cleaner data, better deliverability, and higher revenue per subscriber. Lucas: And the courage to watch your list shrink — knowing it's actually getting stronger. REI proved that a smaller, more engaged list beats a giant, apathetic one every time. Luna: I think that's the takeaway most marketers need to hear. Thanks for walking through it.