Will engagement weighting increase over time?
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Yes, engagement weighting is almost certainly going to get heavier over time. Mailbox providers like Gmail and Outlook have been quietly shifting their filters in this direction for years, and the trajectory isn't reversing.
Here's what that actually means for you. Filters are getting better at distinguishing between subscribers who genuinely want your emails and those who just never unsubscribed. Right now, your inactive subscribers might not hurt you much. In the near future, they will hurt you more. The tolerance for dead weight on a list is shrinking.
What counts as an engagement signal? Opens matter, but they're noisy (Apple Mail privacy protection inflates them). Clicks matter more. Replies matter even more than clicks. Moves out of spam, folder sorting, and adding your address to a contact list all count in your favor. Mailbox providers are building richer pictures of each sender-recipient relationship, not just looking at aggregate stats.
The practical upshot is that sunsetting inactive subscribers is moving from a nice-to-have to a genuine deliverability lever. If you've been sitting on a segment that hasn't clicked in 12 months, that segment is becoming a liability, not just dead weight. Running a proper re-engagement campaign before removing them gives those subscribers one last shot and shows providers you're paying attention.
A smaller list of people who actually read your emails will consistently outperform a bigger list full of ghosts. That's always been true, but the gap is widening. Getting ahead of this now, before tighter weighting punishes you, is the move.
Want to know which of your subscribers are worth keeping? Our RME Clean service can help you sort the keepers from the ones dragging your reputation down.
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