Double opt-in (DOI) is a type of subscription that requires your subscriber to confirm his/her registration. Once your user subscribes, an email is sent out including a link to click and confirm the subscription. This method affects how fast your email list grows, but the benefits outweighs the slow growth.
Why is Double Opt-in important?
By using a Double opt-in confirmation method, you reduce the risk of your newsletter going to a dead email account.
Guarantees the email is valid, prevents getting into spam traps
Informs the recipients email provider that this user wants to receive your email
At Outboxx, we recommend double opt-in as foundation to engaging email marketing. With DOI confirmed subscribers are less likely to report your email as spam.