Latest / The Email Marketing Podcast with Fexingo: Newsletters, Open Rates, and Subscriber Growth / How to Measure and Improve Email List Health
Transcript
- Lucas: So, Luna, you know how we've talked a lot about growing your email list, but what about the health of that list? I was looking at some data from a loyalty program we've been following, and their list health score jumped thirty percent in one quarter just by cleaning things up. Luna: List health score? That sounds like something I should know more about. What exactly goes into that? Lucas: It's a composite measure, but essentially it's the opposite of list bloat. A healthy list has high engagement, low bounces, low complaint rates, and very few spam traps. The loyalty program I mentioned, they had let their list grow unchecked for years, and their open rates had sunk to the low teens. They finally decided to do something about it. Luna: So what did they do? Did they just delete a bunch of subscribers? Lucas: Not exactly. They started with a re-engagement campaign. They sent a targeted email to subscribers who hadn't opened anything in six months, offering a small incentive to stay. If those people didn't engage within two weeks, they moved them to a sunset sequence. After another month of no engagement, they removed them. That's the kind of pruning that improves health. Luna: And that's what boosted their score by thirty percent? Seems like a lot of work, but I get the payoff. Lucas: Yeah, it's not a one-time fix. But the key is to think of list health as an ongoing metric, not a one-off cleanup. This loyalty program now monitors engagement rate, bounce rate, complaint rate, and spam trap hits on a monthly basis. And they have automated sunset rules in place so the list never gets bloated again. Luna: So what's the most important metric to watch? I imagine engagement rate is the big one. Lucas: Engagement is the umbrella metric, yes. But I'd argue bounce rate and spam traps are the ones that can tank your sender reputation fastest. A high bounce rate tells ISPs you're not maintaining your list, and spam traps are basically honeypots set by blocklist operators. Hit one of those and you could end up on a blacklist. Luna: That sounds terrifying. How do you know if you've hit a spam trap? Lucas: You usually don't, until your deliverability tanks. That's why it's better to prevent them by keeping your list clean. Use double opt-in, validate email addresses at signup, and prune regularly. Also, watch your complaint rate - if people are marking you as spam, that's a red flag. The industry benchmark is under zero point one percent. Luna: And what about those sunset rules you mentioned? How do you set them up without losing good subscribers? Lucas: Good question. The idea is to give people a chance to re-engage before you cut them. For example, if someone hasn't opened an email in three months, you might send them a 'we miss you' email with a special offer. If they don't bite, you move them to a lower-frequency list. After six months of no engagement, you might send a final 'last chance' email. Then they're gone. Luna: That makes sense. And it's not just about removing people; it's about segmenting them by engagement level so you don't treat everyone the same. Lucas: Exactly. What's interesting is that this loyalty program also saw a boost in revenue per email sent after the cleanup. They were sending to fewer people, but those people were actually opening and clicking. Their click-through rate nearly doubled. So it's not just about protecting your sender reputation; it's about making every send count. Luna: You know, this reminds me of something I read about how some companies use a 'health score' that includes a measure of list growth versus churn. If your list is growing but churn is high, that's a warning sign. Lucas: Right, and that's a great point. A healthy list isn't just static; it's a pipeline. You want new subscribers coming in, but you also want to keep the ones you have. If you're adding five hundred a month but losing four hundred, you're not really growing. That's why we talk about list churn rate a lot on this show. Luna: So, for someone listening who wants to improve their list health, where should they start? Lucas: First, look at your engagement over the last ninety days. Calculate your active subscriber rate - that's people who've opened or clicked in that window. If it's below twenty percent, you've got work to do. Then, check your bounce rate. If it's above two percent, you need to clean your list. And set up a simple re-engagement campaign for anyone who's gone quiet for sixty days or more. Luna: And once you've done that, how often should you be checking these metrics? Lucas: Monthly is a good cadence. But also, after any major campaign, it's worth a quick look. And definitely before you send a big broadcast. If your list is bloated, that's when you'll see deliverability issues. Luna: It's like checking the oil in your car - you don't wait for the engine to seize. Lucas: Exactly. And the great thing is, most email service providers give you these metrics right in the dashboard. It's not like you have to build a separate analytics tool. The discipline is in actually looking at them and acting. Luna: So, going back to that loyalty program - did they see any immediate impact on their sender reputation or inbox placement? Lucas: They did. Within about six weeks, their inbox placement rate went from around seventy percent to over ninety-five percent. That's a huge jump. And their open rates went from twelve percent to twenty-eight percent. All because they stopped emailing people who didn't want to hear from them. Luna: Wow. That's a compelling story. And it shows that sometimes less is more. Lucas: Absolutely. Look, if you're a marketer and you're worried about your list health, the simplest thing you can do today is to run a quick audit. Pull up your last few campaigns and look at your unsubscribe rate, your spam complaints, and your bounce rate. If any of those are trending up, that's your cue to act. Luna: And, you know, if you're listening and you've been putting off cleaning your list, I hope this episode has given you a nudge. A clean list is a happy list. Lucas: And if this conversation sparked something you might actually use, you know what keeps us going. If you've gotten value from these marketing deep dives, the way these stay ad-free is listener support. You can buy us a coffee at buy me a coffee dot com slash fexingo. No pressure, but it helps keep the lights on and the emails landing in inboxes. Luna: Yeah, we love doing this, and knowing it's useful makes it worth it. And if you can't support, no worries - just keep learning with us. Lucas: Alright, so to wrap up: think of your email list as a garden. You wouldn't let weeds take over, right? Same with your subscribers. Nurture the active ones, pull out the dead weight, and watch your deliverability bloom. Luna: That's a great metaphor. And maybe the best takeaway is to set up those sunset rules so you're not constantly manual pruning. Lucas: Exactly. Automate the process, and you'll keep your list healthy without even thinking about it. Thanks for listening, and we'll catch you next time.