Mailchimp for WordPress version 4.2

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Version 4.2 introduces a live form preview, improved debugging for HTTP requests & responses to Mailchimp’s API servers and new conditional logic features.


  • Live form preview while editing form.


  • Improved conditional fields logic.
  • Debug log now includes request & response data.
  • Form JavaScript events are fired in an isolated thread now, to prevent errors in event callbacks from breaking form functionality.
  • Don’t send empty field values to Mailchimp when updating subscribers.
  • Show interest grouping ID in list overview on settings page.


  • Ninja Forms export checkbox would always state “checked” when form contained a Mailchimp sign-up checkbox.

Please go here for the complete changelog.