Unsubscribe rate
Unsubscribe rate is the percentage of recipients who opted out after a send — a health signal for list relevance and sending frequency, and a far safer way to lose contacts than having them mark mail as spam.
How unsubscribe rate is calculated
Unsubscribe rate = unsubscribes ÷ emails delivered × 100 for a given send. A small, steady rate is normal and even healthy — it removes people who've lost interest before they become dead weight or, worse, complainers.
What matters is the trend and the spikes. A sudden jump signals a specific problem: too many sends, off-target content, or a campaign that missed the mark.
Why unsubscribes are healthier than complaints
When someone no longer wants your mail, you want them to unsubscribe, not hit 'mark as spam'. An unsubscribe quietly removes them; a spam complaint tells the mailbox provider your mail is unwanted and directly damages your sender reputation for everyone else on the list.
That's why a clear, one-click unsubscribe is a deliverability asset, not a leak — it channels departures into the harmless path.
How to keep unsubscribe rate low
- Send at a frequency your audience signed up for — don't over-mail
- Segment so content stays relevant to each group
- Set expectations at signup about what and how often you'll send
- Offer a preference centre so people can dial down instead of leaving
- Watch which campaigns spike opt-outs and fix the pattern
Frequently asked questions
What's a good unsubscribe rate?
Well under 0.5% per send is typical for a healthy list; consistently higher suggests frequency or relevance problems. Track your own baseline and investigate spikes.
Should I try to eliminate unsubscribes?
No. A steady trickle is healthy — it removes disengaged contacts before they hurt engagement metrics or complain. Focus on preventing spikes, not zeroing the number.
Is a one-click unsubscribe risky?
The opposite — it's now expected by major providers and protects you. Making opt-out easy steers unhappy recipients away from the spam button, which is far more damaging.
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