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Email Marketing Glossary.

Clear, no-fluff definitions of every email marketing term that matters—from open rates to double opt-in. 

 

Unsubscribe

To unsubscribe is to opt out of receiving further emails from a sender. Providing a clear, working unsubscribe option is both a legal requirement and a deliverability best practice.

Also known as: opt-out, email opt-out

An unsubscribe link can feel like losing a subscriber, but it's actually a pressure-release valve that protects your program. Making it easy is required by law — and better for you than the alternative.

Why is an unsubscribe option required?

Laws like CAN-SPAM and GDPR require a clear, easy way to opt out, and you must honor requests promptly. Hiding or delaying unsubscribes can lead to penalties.

Why unsubscribes are healthier than spam complaints

When people can't find the unsubscribe link, they hit "mark as spam" instead — which damages your sender reputation far more than a clean opt-out.

Reducing unsubscribes the right way

Rather than hiding the link, reduce unsubscribes by sending relevant content, respecting frequency, and offering a preference center so people can dial back instead of leaving entirely.

Related terms

CAN-SPAM Act GDPR (Email Marketing) Opt-In Permission-Based Marketing CCPA

Related reading from Drip

7 Advanced Ways to Reduce Email Unsubscribe Rates Unsubscribe & Resubscribe (Help Center)

Frequently asked questions

What does unsubscribe mean?
To unsubscribe is to opt out of receiving further emails from a sender. Every marketing email must include a clear, working unsubscribe option, and senders must honor requests promptly.
Is an unsubscribe link legally required?
Yes. Laws like CAN-SPAM (US) and GDPR (EU) require a clear, easy way to opt out of marketing emails, and you must process unsubscribe requests promptly. Hiding or ignoring them can result in penalties.
Are unsubscribes bad for my email program?
Not really. A modest unsubscribe rate keeps your list engaged. It's far better for someone to unsubscribe than to mark your email as spam, which damages your sender reputation and deliverability much more.
How can I reduce unsubscribes without hiding the link?
Send relevant, segmented content, respect a sensible frequency, and offer a preference center so subscribers can reduce how often they hear from you instead of opting out entirely.
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