MailBluster utilizes a double opt-in mechanism to validate subscriber consent. This process ensures that subscribers not only sign up but also confirm their subscription via a verification email. By employing this method, MailBluster aims to maintain a high standard of compliance and deliverability.
Here is how double opt-in works in MailBluster:
Double opt-in is an additional step to the email subscription opt-in process, which requires a lead to verify the email address to subscribe to your brand. You need to enable double opt-in using the MailBluster developer API, and then new leads will receive a confirmation email (technical knowledge is required to use the API).
Please Note: Without using MailBluster developer API, the double opt-in Subscribe option will not work.
First, you need to set up the Double Opt-in properly. Go to your MailBluster Brand > Settings > Double Opt-in. Insert suitable Subject and your Sender name. Then select from verified Sender email address (AWS/Postmark/Mailgun). Now, select you Editor and prepare your email content. Once completed, set a Redirect URL (optional) and click Save changes.

Then use the API endpoints from the Developer API and use integrate them into your website. Technical knowledge is required to implement Double Opt-in on your website.

Keep in mind that if you manually add leads to MailBluster, those leads won’t receive your double opt-in confirmation email.