Bounces, complaints and list hygiene

0:00 List hygiene

Here's a counter-intuitive truth about email. Sometimes the fastest way to make more money is to email fewer people. That sounds wrong, until you understand that mailbox providers judge you on how your whole list reacts. Thousands of people who never open, never click and sometimes hit report spam drag down the chances that your best customers see your email at all. In this lecture you'll learn how bounces, complaints and spam traps affect your reputation, how to read bounce codes, how to run a sunset policy with a re-engagement series, and which monitoring tools to check.

0:42 Reputation signals

Reputation is earned send by send. Signals that hurt include bounces, spam complaints, spam trap hits and low engagement. Signals that help include clicks, replies, people moving your email out of spam and adding you to their contacts. Think of it like a restaurant review site. A few bad reviews among hundreds of good ones barely matter. But if most diners just walk out without eating, the site notices. List hygiene is the routine work that keeps these signals healthy, and it's far cheaper than trying to repair a damaged reputation later.

1:22 Bounces

Let's start with bounces, emails that couldn't be delivered. A hard bounce is permanent: the address doesn't exist, or the domain is invalid. Remove it immediately, and most platforms do this automatically. A soft bounce is temporary: mailbox full, server busy, message too large. Platforms retry, and you suppress after repeated failures. Bounce messages include codes. Codes starting with five are permanent; codes starting with four are temporary. Five point one point one means the mailbox doesn't exist. But watch for five point seven codes, which mean rejected for policy or authentication reasons. A sudden wave of those is an emergency, not a list problem.

2:08 Complaints

Next, complaints: when someone clicks report spam. It's one of the strongest negative signals there is. Why do people complain? They don't remember signing up, often because of a long gap before the first email. Emails are too frequent or not what was promised. The unsubscribe link is hard to find, so report spam is easier. Or they never consented at all. So send a welcome email immediately, use a recognisable sender name, keep to the frequency you promised, and make unsubscribing effortless with one-click unsubscribe. And make sure complaints from feedback loops automatically suppress the person.

2:50 Spam traps

Now spam traps: addresses used by mailbox providers and anti-spam organisations to catch poor practices. Pristine traps were never used by a real person, so they only appear on scraped or purchased lists. Recycled traps are old, abandoned addresses reactivated as traps, catching senders who never remove inactive subscribers. And typo traps are common misspellings of real domains, like gmial dot com. Hitting traps can get you blocklisted. The cure is prevention: consent-based collection, real-time validation at sign-up, double opt-in, and regular removal of long-term inactive addresses.

3:28 Sunset policy

That brings us to the sunset policy. Define inactivity based on your sending frequency and buying cycle. For example: received at least eight emails, no clicks in a hundred and eighty days, no orders in a year, and subscribed more than ninety days ago. Remove those people from regular campaigns and send a three-email re-engagement series. Anyone who clicks goes back to engaged, with a preference centre offer. Anyone who doesn't, a week after the final email, gets suppressed. Suppressed, not deleted, so you keep the consent record. The full policy and email copy are in the lesson text. Here's the key idea. A smaller, engaged list almost always outperforms a large, unengaged one.

4:18 Re-engagement copy

Let's hear the re-engagement copy, because tone matters. Email one: still want to hear from us? It's been a while, we don't want to crowd your inbox, here's what's new, and a button saying yes, keep me subscribed. Email two: pick what you'd like, or less often, with topic choices and a monthly digest option. Email three: we'll stop emailing you soon. Unless you click below, this is our last email. No hard feelings, you can re-subscribe any time. Notice what's missing. No guilt-tripping, no fake urgency, and a clear unsubscribe link in every one.

4:59 Example 1: US creator (illustrative)

Let's do a simple worked example with illustrative numbers. A US-based creator has a list of forty thousand, a complaint rate around zero point four percent, and falling Gmail placement. Investigation: fifteen thousand subscribers came from a giveaway three years ago and haven't clicked in over a year. She sends the three-email re-engagement series, suppresses about eleven thousand who don't respond, moves her weekly email to a clear, consistent schedule, and adds one-click unsubscribe. Complaint rates fall below zero point one percent, and clicks per email actually rise, with a smaller list.

5:39 Example 2: Karachi store (illustrative)

Now a realistic scenario after a sale season. After an eleven eleven and White Friday push, a Karachi store sees its Gmail spam rate climb to zero point two percent, plus more four point seven deferrals, which means Gmail is slowing them down. The cause: sending to the whole list three times a day, including seventy thousand addresses from an old contest. The fixes: a frequency cap of one promotional email a day, segment-based sending, the sunset policy, and a pause on the contest segment until it's re-engaged. Within weeks, deferrals clear and the spam rate falls back below zero point one.

6:23 Monitoring

Which tools should you check? Google Postmaster Tools shows your spam rate, authentication and delivery errors at Gmail. Yahoo Sender Hub covers Yahoo, including its complaint feedback loop. And Microsoft's SNDS and JMRP cover Outlook dot com. Most email platforms process feedback-loop complaints automatically, so confirm yours does. Also watch hard bounce rate, which should be very low, unsubscribe rate, and click rate by segment, because declining engagement predicts deliverability problems before they hit. Common mistakes: keeping hard bounces, never removing inactives, hiding the unsubscribe link and long gaps between sign-up and the first email.

7:04 Recap and try this now

Let's recap. Bounces, complaints, spam traps and low engagement damage your sender reputation; clicks, replies and not-spam actions help. Remove hard bounces immediately, suppress repeated soft bounces, and treat five point seven rejections as an authentication emergency. Prevent complaints with instant welcomes, promised frequency and easy unsubscribes. And run a sunset policy with a respectful re-engagement series. Here's your try this now. Pull your bounce, complaint and unsubscribe rates for your last five campaigns, then adapt the sunset policy in the lesson text with thresholds that fit your sending frequency.