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.
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Guarantees the email is valid, prevents getting into spam traps
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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.