How does double opt-in work?
SharperEmail supports double opt-in on subscriptions. If this feature is enabled (on Subscription form setup), when someone subscribes to your newsletter they will receive a generic email asking them to click a link to confirm their subscription. If you have double opt-in enabled then a SP code will display next to their email address if they’ve subscribed, but not yet clicked the email opt-in link. A S2 will be next to their email address once they’ve clicked the email opt-in link.
