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Configure the Subscribe Form module for MailChimp double opt-in

MailChimp changed their default subscriber setting to single opt-in โ€“ in other words, a subscriber submits a subscription form connected to the MailChimp API and is automatically subscribed. Double opt-in is when the subscriber submits the form and receives an email asking for subscription verification.

If you're using the Beaver Builder Subscribe Form module, you can enable double opt-in with a Beaver Builder filter.

To enable double opt-in for MailChimp with the Subscribe Form module:

  • Add the following code to your child theme's functions.php file.

    // Enable double opt-ins.
    add_filter( 'fl_builder_mailchimp_double_option', '__return_true' );

By default, the double opt-in setting in Beaver Builder is false, but this filter sets it to true.