Double opt-in is a great way to enhance deliverability by ensuring emails are correct and the recipient indeed wants to subscribe to your mailing list. This makes for a happier spam-free email world.
But first, you may be asking what is double opt-in? Usually when a subscriber signs up for your newsletter they enter their email in a signup form and are automatically subscribed to your list. This usually works great but what happens if someone misspells their email, or enters someone else's email? In this case newsletters will bounce or end up being flagged as spam which hurts your deliverability.
Double opt-in adds another step to the signup flow by asking the subscriber to confirm their email.
Want to try it out? You can take it for a spin by creating a new list then signing up through the lists signup form. By default all lists are double opt-in and require recipient confirmation but this can be changed by going to your list and clicking edit list details.
Double opt-in only effects signup forms and embed codes. Your subscribers won't be asked to confirm their email if they are added by our import feature or through the API. As always make sure you have permission to email recipient added this way.