Rekko is currently integrated with Mailchimp when using the Email Capture form. This mean, if you input your Mailchimp API key and then select which list you’d like the email addresses to go to, email addresses collected through the Email Capture form will go directly to that list! No double opt-ins needed for this method.
What about other ESPs?
While Rekko is not currently integrated with other email service providers other than Mailchimp, you can certainly use an Action URL to post any email address Rekko collects to your desired server.
In the Email Capture form wizard, you can find this option under the Advanced settings. If you’re using Form Engagement, you can find this in the Form Settings. Learn more about Form Engagement here.