What is Email Unsubscribe Rate?

The email unsubscribe rate measures the percentage of recipients who opt out of future communications from a sender. It’s calculated by dividing the number of unsubscribes by the number of delivered emails, then multiplying by 100. Recipients typically unsubscribe via a link in the email. This metric is crucial for email marketing, alongside open rates, click-through rates, bounce rates, and conversion rates. A high unsubscribe rate may signal issues with content relevance or email frequency. Marketers use this data to refine strategies and improve subscriber retention.