What is an email sunset policy? (Revisiting from List Hygiene)
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You've built a list, sent campaigns, and somewhere along the way a chunk of your subscribers just... stopped opening. They're not unsubscribing. They're not complaining (yet). They're just silent. A sunset policy is how you decide what to do with them before they become a real problem.
An email sunset policy is a set of rules that defines what happens to subscribers after a period of inactivity. After a defined window without opens, clicks, or other engagement, those subscribers either get moved into a win-back campaign or suppressed from your regular sends altogether. They're not deleted. They stay in your database. They just stop receiving campaigns that they're clearly ignoring.
Why does this matter for deliverability? Mailbox providers like Gmail and Outlook watch how your subscribers behave. When a large chunk of your list consistently ignores your emails, that signals to filters that your content isn't wanted. Low engagement drags down your sender reputation, which makes it harder for the people who do want your emails to actually receive them.
There's also a spam trap risk. Old, inactive addresses can turn into spam traps over time. Continuing to send to addresses that haven't engaged in a year or more puts you in the territory of mailing to traps without even knowing it.
A common sunset window is 90 to 180 days of no engagement, though this varies by how often you send. A daily newsletter might sunset after 60 days. An e-commerce brand sending weekly might wait until the six-month mark. The right window depends on your sending frequency and your audience's buying cycle (a seasonal business, for example, shouldn't sunset someone after one quiet quarter).
The typical flow looks like this. A subscriber goes quiet. You wait out your defined window. You send a re-engagement or win-back campaign, sometimes a series of two or three emails, to give them a final chance. If they still don't engage, you suppress them. Done. You haven't lost them permanently. If they come back through a new sign-up or a purchase, they're active again.
And the goal isn't to shrink your list for its own sake. It's to make sure the list you're sending to actually reflects people who want to hear from you. A smaller, engaged list outperforms a bloated, silent one every single time.
If you're not sure which subscribers on your current list are worth keeping, a list clean can help you separate the genuinely inactive from addresses that are risky to mail at all. RME Clean gives you that breakdown, so you're not guessing.
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