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)
Please Note: Without using MailBluster developer API, the double opt-in Subscribe option will not work.
First, you need to set up the campaign for Double Opt-in from Settings > Double Opt-in. Set the redirect URL.
![Clicking on Double opt-in under Settings](https://mailbluster.com/wp-content/uploads/2024/01/double-opt-in-01.png)
![Composing email for double opt-in](https://mailbluster.com/wp-content/uploads/2024/01/double-opt-in-02.png)
![Advance settings for double opt-in](https://mailbluster.com/wp-content/uploads/2024/01/double-opt-in-03.png)
Then use API endpoints from the Developer API and use it on your website. Technical knowledge is required to implement Double Opt-in on your website.
![API documentation showing API endpoints under Manage leads](https://mailbluster.com/wp-content/uploads/2024/01/double-opt-in-04.png)
Also note that manually added leads won’t receive double opt-in confirmation email.