The Email Delivery Guru: Require a login to opt-out?
“If you’re wondering if it’s OK to require that recipients must log into your website before they can unsubscribe from your emails, the answer to that is no— it’s prohibited under US Federal law.”
“If you’re wondering if it’s OK to require that recipients must log into your website before they can unsubscribe from your emails, the answer to that is no— it’s prohibited under US Federal law.”