How to Enable Single Opt-in for MailChimp in OptinMonster

MailChimp, one of the popular email service provider, allows you to enable single opt-in when using OptinMonster’s native MailChimp integration.

OptinMonster makes enabling single opt-in for MailChimp a one-click process. Follow this guide to enable single opt-in for MailChimp.

  1. Create or Modify an Optin
  2. Integrate OptinMonster with MailChimp
  3. Disable MailChimp Double Opt-In
  4. FAQs

Step 1 – Create or Modify an Optin

Create a new optin or modify an existing optin from OptinMonster Dashboard. Open the optin builder by selecting the Edit link.

Select the edit button from your Dashboard to edit an optin you've already created.

Once your optin is open in the builder, navigate to the Integrations panel.

Select the Integrations tab to view the Integrations panel.

Step 2 – Integrate OptinMonster with MailChimp

If you haven’t already connected your optin with your MailChimp account, follow our How to Connect OptinMonster with MailChimp guide to complete this step.

Once connected, select your MailChimp Integration from within the Integrations panel to proceed.

Select the MailChimp integration you wish to configure from the Integrations panel.

Step 3 – Disable MailChimp Double Opt-in

Within the Lead Options section for your MailChimp Integration you can now toggle the Enable Double Opt-in? option to enable single opt-in.

You can configure double opt-in for your campaign in the Lead Options section of the integrations panel.

Save your optin and you’ve successfully enabled single opt-in! New subscribers will be directly added to your MailChimp List without having to confirm their subscription.


Q: Can I disable double opt-in if I’m using a Custom HTML integration?

A: No, it’s only possible to disable MailChimp’s double optin when using our native MailChimp integration. This is because MailChimp allows single opt-in only through their API, a setting that we cannot override if you’re using a Custom HTML integration.