Is it safe to email people who haven't unsubscribed yet?

Here's a question worth sitting with: if someone never unsubscribed, does that mean they still want your emails? Not really. It might mean they gave up trying to find the unsubscribe link. It might mean they're deleting your emails on autopilot. It might mean they're one bad subject line away from hitting "Report Spam" instead.

Not unsubscribing is the absence of action, not a vote of confidence. Mailbox providers like Gmail and Outlook know this. They're not watching your unsubscribe rate to judge your reputation. They're watching what real people actually do with your emails, which means opens, clicks, and replies count. Deletions without opens and spam reports count against you.

So the question to ask isn't "have they unsubscribed?" It's "are they engaging?" Here's a practical breakdown:

• Opened or clicked in the last 90 days: Safe to keep sending.
• No opens or clicks in 90 to 180 days: Worth sending a re-engagement email. Ask if they still want to hear from you. If they don't respond, start pulling back.
• No opens or clicks in 180+ days: These subscribers are actively hurting your deliverability. Stop emailing them even if they never formally opted out.

This is what a sunset policy does. It creates a clear rule for when a subscriber is treated as inactive, regardless of whether they ever clicked "unsubscribe." Something like "no engagement in 6 months means they leave the active list" is a reasonable starting point. Some senders go tighter (3 months for high-frequency lists), some go looser (12 months for low-frequency ones). The exact threshold matters less than having one at all.

One thing worth noting: email clients like Gmail use machine learning to figure out which emails a user actually cares about. A subscriber who never opens your emails is essentially teaching Gmail that your mail isn't worth surfacing. That decision gets applied across senders with similar patterns, not just you. So keeping a bunch of non-openers on your active list can quietly drag down deliverability to your engaged subscribers too. (That part surprises a lot of people.)

If you're not sure which subscribers on your list are still worth emailing, we can help you clean it up. RME Clean flags who to keep, who to watch, and who to suppress, so you're not making those calls manually.