Latest / The Newsletter Podcast with Fexingo: Substack, Beehiiv, and Email Newsletter Business / How Newsletters Use Acquired Email Lists Without Burning Trust
Transcript
- Lucas: There's this temptation that every newsletter operator faces at some point — you're trying to grow, you've hit a plateau, and you see someone selling a list of 50,000 emails in your niche for maybe a few hundred dollars. And your brain starts doing math. Luna: Right, because if just 10 percent convert, that's 5,000 new subscribers. It feels like a shortcut. Lucas: Exactly. And the reality is, most of the time it's a disaster. But there are situations where list acquisition actually works — if you handle it with the right strategy. And that's what we're digging into today: the rare case when buying a list doesn't burn your brand or your sender reputation. Luna: You know, before we go further, something we've always been clear about on this show is that we don't run ads. That's a choice we made from day one. If these conversations have helped you think about your newsletter differently, and you want to support that ad-free approach, you can find us at buy me a coffee dot com slash fexingo. It genuinely helps keep the lights on. Lucas: Yeah, and we mean that — listener support is the only reason we can keep this independent. So thank you to anyone who's chipped in. Now, back to the list-buying dilemma. Lucas: Let me set up a concrete example. There's a B2B marketing newsletter called 'The CMO Brief' — I'm changing the name for privacy, but the case is real. They had about 25,000 organic subscribers built over three years. Then a competitor in the same space, a smaller newsletter called 'Marketing Ops Weekly,' shut down. The owner offered to transfer their entire list of roughly 80,000 emails. Luna: Eighty thousand — that's a big jump. And I'm guessing most of those subscribers had been inactive for a while, because the newsletter was shutting down? Lucas: Exactly. Open rates had dropped to around 12 percent. So it wasn't a high-quality list. But the CMO Brief team saw an opportunity because the audience was exactly their target: marketing operations directors and VPs. They paid a small fee — essentially for the transfer work — and then they executed what I call the 'opt-in migration framework.' That's the key. Luna: Walk me through that framework. Because I think most people would just import the list and blast their welcome email. Lucas: Right, and that's how you get spam complaints and your domain blacklisted. The framework has three steps. Step one: the warm-up email. You send a single email from the acquired list's original sender address — in this case, it was still from 'Marketing Ops Weekly' — saying something like, 'We're shutting down, but we've partnered with The CMO Brief, who shares our focus. If you want to hear from them, click here to opt in. If you do nothing, you won't hear from anyone.' Luna: So you're not assuming consent. You're asking for it explicitly, and you're making it easy to say no. Lucas: Exactly. That first email went out to the full 80,000. About 32,000 people clicked through — that's a 40 percent opt-in rate. Already you've cut the list by more than half. But you're left with people who actually raised their hand. That's step one. Luna: And step two? Lucas: Step two is the confirmation ask. When those 32,000 clicked, they landed on a sign-up page for The CMO Brief that required a double opt-in — they had to confirm their email address. That's not just good practice, it's legally required under GDPR if any of those subscribers are in Europe. And in this case, about 20 percent of the list was eu based. Luna: That's a huge drop. How many confirmed? Lucas: Of the 32,000 who clicked, about 18,000 completed the double opt-in. So from 80,000 raw names, you're down to 18,000 confirmed, interested subscribers. That's a 77 percent reduction. But here's the thing — those 18,000 people are gold. Luna: Because they've actively opted in twice. They're not going to mark you as spam. Lucas: Right. And step three is the content reset. You don't just drop them into your regular newsletter cadence. You send a dedicated welcome sequence that acknowledges the transition — 'You asked to hear from us, here's what we're about' — and you give them a chance to set their preferences. The CMO Brief offered a frequency option: weekly digest or daily brief. About 70 percent chose weekly. Luna: That's smart. Let the subscriber control the relationship from the start. Lucas: Exactly. So six months later, of those 18,000 confirmed subscribers, about 12,000 were still actively opening — a 67 percent retention rate. That's not bad for an acquired list. And their overall open rate for the whole newsletter actually went up, because the new subscribers were more engaged than some of their old ones. Luna: I want to talk about the legal side. Because I think a lot of newsletter operators are fuzzy on what's actually allowed. Lucas: Yeah, and it matters. In the US, can spam doesn't technically require opt-in — it's an opt-out law. You can send commercial email to anyone as long as you have a valid unsubscribe link and you honor it. But if you're sending to a purchased list, you're almost certainly violating the terms of service of your email platform. Both Beehiiv and Substack prohibit importing purchased lists. They can suspend your account. Luna: And in Europe, GDPR is much stricter. You need explicit consent, and you need to be able to prove where you got that consent. If you buy a list, you almost never have that proof. Lucas: Right. The CMO Brief case worked because they didn't 'buy' a list in the traditional sense. They acquired the list through a business partnership with the defunct newsletter, and they used the opt-in migration framework. That's legally defensible. But if you just buy a CSV from some random broker and blast it, you're asking for fines and deliverability hell. Luna: I also want to talk about sender reputation, because that's where a lot of people get burned. Lucas: It's the silent killer. When you send to a large list that hasn't engaged with you before, internet service providers like Gmail and Outlook look at your sending patterns. If you suddenly blast 50,000 emails and get a high bounce rate — say 15 percent or more — plus a bunch of spam complaints, your domain gets flagged. Then even your regular subscribers stop getting your emails. Luna: What's the threshold for spam complaints? Lucas: Industry standard is to keep it below 0.1 percent. One complaint per thousand emails. If you hit 0.2 or 0.3 percent, you're in trouble. With a purchased list, it's not uncommon to see complaint rates of 1 percent or higher. That's a one-way ticket to the spam folder. Luna: So the warm-up and double opt-in steps are also protecting your sender reputation. Lucas: Exactly. By the time those 18,000 people got their first real newsletter from The CMO Brief, they had already clicked twice. They wanted that email. Complaint rate was essentially zero. Luna: Are there other examples where list acquisition worked? Or maybe where it failed spectacularly? Lucas: There's a cautionary tale from a lifestyle newsletter I know. They bought a list of 30,000 'health-conscious consumers' from a broker. The list was supposedly curated from people who opted in to receive health tips. But when they sent their first email, they got a 40 percent bounce rate — most of those email addresses were dead or fake. And the spam complaints hit 2 percent. Their domain got blacklisted with Spamhaus for three months. They basically had to rebuild their entire email infrastructure from scratch. Luna: Ouch. So the broker lied about the list quality? Lucas: Almost certainly. And there's no recourse. List brokers are largely unregulated. Even if they promise opt-in data, you have no way to verify it. That's why the only safe acquisition is one where you have a direct relationship with the original sender — like the defunct newsletter example. Luna: Let's talk about the financials. What did The CMO Brief pay for that list? Lucas: They paid five thousand dollars — essentially a transfer fee. But they also spent another two thousand on the welcome sequence design and a small segmentation tool. So seven thousand total. Over the next six months, those 12,000 active subscribers generated about 15 percent of the newsletter's total revenue through referrals and direct sponsorships. The return on investment was positive within three months. Luna: So it's not a magic bullet, but if you do it right, it can work. Lucas: Right. The key is to treat the acquisition not as a list buy, but as an audience migration. You're not taking shortcuts — you're building a bridge. Luna: And you have to be willing to lose most of the names to keep the ones that matter. Lucas: Exactly. I'd rather have 12,000 people who want my email than 80,000 people who ignore it. Quality over quantity is cliché, but in email, it's literally the difference between a healthy list and a dead domain. Luna: What about timing? Does it matter when you send that first warm-up email? Lucas: Huge. You want to send it when the recipient is most likely to see it and act. For B2B lists, mid-week mornings work best — Tuesday or Wednesday around 10 a.m. local time. If you send it on a Monday at 6 a.m., people are clearing their inbox and will delete it. Also, stagger the sends. Don't blast all 80,000 at once. Use a slow drip — maybe 10,000 per day — to avoid triggering ISP rate limits. Luna: And the subject line? Should it mention the original newsletter's name? Lucas: Absolutely. The warm-up email came from Marketing Ops Weekly's address with a subject line like 'Important update about Marketing Ops Weekly.' That's familiar. If it had come from The CMO Brief with a subject like 'Welcome to your new newsletter,' people would have thought it was spam. You have to honor the existing relationship. Luna: That makes sense. You're leveraging trust that already exists. Lucas: Exactly. So the takeaway: list acquisition can work, but only if you approach it as a permission-based migration, not a spam blast. Use the three-step framework, respect the legal and deliverability risks, and be ready to lose most of the names. If you do that, you can inherit an audience without inheriting their resentment. Luna: And maybe save yourself a lot of deliverability headaches in the process. Lucas: Exactly. Next time, we'll look at how newsletters are using referral contests — not just referral programs, but actual contests with prizes. There's some interesting data on what kind of incentives actually move the needle.