Breaking Up With Your Subscribers: When and How to Run a Sunset Campaign

Somewhere in your database lives a subscriber who signed up for a competition in 2019, won nothing and hasn't opened an email since. You've sent them roughly 300 campaigns. They've sent you nothing back.

That's not a relationship. That's a situationship. And it's costing you more than you think.

A sunset campaign (also called a re-engagement campaign) is how you end it gracefully. You give inactive subscribers one last, honest chance to stay. The ones who answer come back warmer. The ones who don't get removed from your sends, and your deliverability gets a little breathing room.

Here's when to do it, how to do it and how to stop feeling guilty about a shrinking list.

Why dead subscribers aren't harmless

"They're not unsubscribing, so what's the harm?" Fair question. Here's the harm:

• Mailbox providers judge you on engagement. Gmail, Yahoo and Microsoft all watch how recipients react to your mail. A big chunk of your list ignoring you every week tells them your mail isn't wanted, which pushes more of it toward spam. Including for the people who do want it.
• Spam complaints climb. Someone who forgot why they're getting your mail is far more likely to hit "Report spam" than "Unsubscribe." Google asks bulk senders to keep spam complaint rates below 0.3%, and recommends staying under 0.1%. A stale list makes that harder.
• Old addresses go bad. Abandoned inboxes eventually stop working, and some get recycled into spam traps that flag senders with poor list hygiene. [Likely] An address that's been silent for years is a higher spam trap risk than one that clicked last month.
• You pay for them. Most email platforms price by list size or volume. Every dead address eats budget you could put behind people who actually read your stuff.
• Your numbers lie. Open and click rates calculated across thousands of ghosts make every campaign look worse than it performed with real humans.

Inbox placement is earned by the whole list, not just your best subscribers.

Step 1: Define "inactive" (and stop trusting opens)

The tricky part. Since Apple launched Mail Privacy Protection, Apple Mail pre-loads emails and registers an "open" whether a person read it or not. So a subscriber can look active on paper and be completely checked out.

Base inactivity on signals a human has to create:

• No clicks.
• No replies.
• No purchases, bookings or logins (if you can sync that data).
• No form submissions or preference updates.

Then set the window based on how often you send:

• Daily or several times a week: no engagement in 60 to 90 days.
• Weekly: no engagement in 90 to 180 days.
• Monthly or less: no engagement in 6 to 12 months.
• Seasonal businesses: measure across your last full season, not the quiet months.

These ranges are starting points, not rules. Your industry, buying cycle and list age all shift them. Start conservative and tighten once you see the results.

Step 2: Decide who to leave out

Not everyone who's quiet on email is disengaged from your business. Exclude these people before you send a single breakup email:

• Recent customers. Someone who bought last week through your website but never clicks emails is still a customer. Check purchase data first.
• New subscribers. Anyone who joined in the last 30 to 60 days hasn't had time to become inactive. They belong in your welcome series.
• Transactional-only contacts. People who only receive invoices, OTPs or account notices don't belong in a marketing sunset flow.
• Anyone already opted out or blocked. Suppression lists and NCC Opt-Out Registry blocks come first. You can't "re-engage" someone who's asked you to stop.

New to building these groups? Our guide to five segments every SA business should build this week: https://www.touchbasepro.com/blog covers the lapsing segment that feeds this flow.

Step 3: Run the three-email sunset flow

Three emails. Two to three weeks. Each one gives the subscriber an easy way to say "I'm still here."

Email 1: The check-in

Goal: Remind them who you are and make staying easy.

• Keep it short and human. No guilt trips.
• Remind them why they signed up and what they get from you.
• Offer a preference centre so they can choose fewer emails or different topics instead of leaving.
• One clear button: "Keep me on the list."

Subject line ideas:

• Still into us?
• We noticed you've gone quiet
• Too many emails? Let's fix that

Email 2: The value play

Goal: Give them a reason to care again.

• Send your single best piece of content, a useful tool or a genuine offer.
• Show what they've missed: a new product, a popular guide, a feature.
• Keep the "stay subscribed" button visible.

Subject line ideas:

• The best thing we've sent all year
• A little something to tempt you back
• You missed this. Here it is again

Email 3: The breakup

Goal: Be honest and give them a final choice.

• Tell them plainly that you'll stop emailing unless they click.
• Keep it light. A bit of humour lowers the awkwardness and often earns the most clicks of the series.
• One button. One click. No login, no form, no survey before they can stay.

Subject line ideas:

• This is our last email (unless you say otherwise)
• Should we stop emailing you?
• It's not you. Actually, it might be you

Timing: Space the emails five to seven days apart. Send them at your usual best-performing time, not a random Sunday night.

Step 4: Deal with the results

After the third email, sort everyone into two groups.

They clicked:

• Move them back into your active list, ideally into your engaged segment.
• Respect what they told you. If they picked "monthly only" in the preference centre, send monthly only.
• Watch them for the next 60 days. Someone who clicked "stay" and then vanishes again doesn't need a second sunset flow.

They didn't respond:

• Suppress them from marketing sends. Suppression is better than deletion because you keep a record of who they are, when they went inactive and why they stopped receiving mail. That protects you if a contact ever asks what happened to their data, and it stops the address from being re-imported by accident.
• Don't move them to SMS or WhatsApp by default. Only contact them on another channel if you hold valid consent for that channel. Being ignored on email doesn't grant you a new route into their phone.

Step 5: Know what good looks like

Set expectations before the boss sees the list shrink.

• Reactivation rate: the share of inactive subscribers who clicked to stay. [Guessing] A low single-digit percentage is common. Even a small win-back means real people who chose you twice.
• Deliverability after the purge: track inbox placement, open and click rates on your next few campaigns. They should improve as the dead weight leaves.
• Spam complaint rate: should drop as you stop mailing people who forgot you.
• Revenue per email sent: a smaller, warmer list often makes more money per send.

The list gets smaller. The results get better. That's the trade.

Step 6: Turn it into a habit, not a spring clean

A one-off purge feels great for a month. Then the ghosts come back.

Automate the flow. Set up a rule that drops subscribers into the sunset sequence the moment they hit your inactivity threshold.

Review your inactivity window every quarter. If reactivation rates are tiny, your window might be too long.

Fix the leak upstream. If lots of subscribers go cold within months of joining, look at your signup sources and welcome series. Competition entrants and bought lists (please, no) usually make up the bulk of future ghosts.

Common sunset campaign mistakes

• Sending the breakup email to everyone at once. If your inactive segment is huge, stagger the sends. A sudden spike of mail to old, unresponsive addresses looks suspicious to mailbox providers.
• Making staying hard. Asking someone to log in, confirm a password or fill in a survey before they can stay guarantees most won't.
• Using opens to decide who's active. Apple's privacy features make this unreliable. Use clicks and real actions.
• Guilt-tripping. "You're breaking our hearts" works once, maybe. Sad-puppy copy across three emails gets reported as spam.
• Re-importing suppressed contacts. Someone uploads an old spreadsheet, and your ghosts are back. Keep suppression lists locked in your platform.

Where TouchBasePro fits in

TouchBasePro lets you build dynamic inactivity segments from click and engagement data, then trigger a sunset flow automatically when a subscriber crosses your threshold. Suppressed contacts stay suppressed, so old spreadsheets can't sneak the ghosts back in.

And if a subscriber has opted in to SMS or WhatsApp, you can run the same win-back logic across channels from one platform. No list exports, no duct tape.