Oct 012015
WordPress Plugin Name: MailChimp for WordPress
Plugin URL:https://wordpress.org/plugins/mailchimp-for-wp/

Plugin Author: ibericode
WordPress profile: ibericode
Plugin version: 4.1.15
Last updated: February 7, 2018 (2 weeks ago)
Tested up to (WP version): WP 4.9.4
Downloaded: 11,171,488
Rating: 5 (out of 5)


MailChimp for WordPress

Adding sign-up methods for your MailChimp lists to your WordPress site should be easy. With this plugin, it finally is.

MailChimp for WordPress helps you add more subscribers to your MailChimp lists using various methods. You can create good looking opt-in forms or integrate with any other form on your site, like your comment, contact or checkout form.

Some of the MailChimp for WordPress features

  • Connect with your MailChimp account in seconds.

  • Sign-up forms which are good looking, user-friendly and mobile optimized. You have complete control over the form fields and can send anything you like to MailChimp.

  • Seamless integration with the following plugins:

    • Default WordPress Comment Form
    • Default WordPress Registration Form
    • Contact Form 7
    • WooCommerce
    • Gravity Forms
    • Ninja Forms 3
    • WPForms
    • BuddyPress
    • MemberPress
    • Events Manager
    • Easy Digital Downloads
  • A multitude of available add-on plugins:

  • Well documented. Our knowledge base is updated daily.

  • Developer friendly. MailChimp for WordPress is built to be extensible, and comes with a code reference for developers.

Become a Premium user

MailChimp for WordPress has a Premium add-on which comes with several additional benefits.

  • Multiple forms (with AJAX)
  • Advanced MailChimp e-commerce integration for WooCommerce
  • Email notifications
  • An easy way to style your forms
  • Detailed reports & statistics

View more Premium features

What is MailChimp?

MailChimp is a newsletter service that allows you to send out email campaigns to a list of email subscribers. MailChimp is free for lists up to 2000 subscribers, which is why it is the newsletter-service of choice for thousands of businesses.

This plugin acts as a bridge between your WordPress site and your MailChimp account, connecting the two together.

If you do not yet have a MailChimp account, creating one is 100% free and only takes you about 30 seconds.


Use the WordPress.org plugin forums for community support where we try to help all of our users. If you found a bug, please create an issue on Github where we can act upon them more efficiently.

If you’re a premium user, please use the email address inside the plugin for support as that will guarantee a faster response time.

Please take a look at the MailChimp for WordPress knowledge base as well.

Add-on plugins

There are several add-on plugins for MailChimp for WordPress, which help you get even more out of your site.


The plugin is translated using Transifex. If you want to help out, please head over to the translation project on Transifex.


MailChimp for WordPress is being developed on GitHub. If you want to collaborate, please look at ibericode/mailchimp-for-wordpress.

Customizing the plugin

MailChimp for WordPress comes with many filter & action hooks which allow you to modify the default plugin behavior. We’re also maintaining a collection of common code snippets for MailChimp for WordPress.


Installation Instructions

Installing the plugin

  1. In your WordPress admin panel, go to Plugins > New Plugin, search for MailChimp for WordPress and click “Install now
  2. Alternatively, download the plugin and upload the contents of mailchimp-for-wp.zip to your plugins directory, which usually is /wp-content/plugins/.
  3. Activate the plugin
  4. Set your MailChimp API key in the plugin settings.

Configuring Sign-Up Form(s)

  1. Go to MailChimp for WP > Forms
  2. Select at least one MailChimp list to subscribe people to.
  3. (Optional) Add more fields to your form using the add MailChimp field dropdown.
  4. Embed a sign-up form in pages or posts by using the [mc4wp_form] shortcode.
  5. Show a sign-up form in your widget areas using the “MailChimp Sign-Up Form” widget.
  6. Show a sign-up form from your theme files by using the following PHP function.


    if( function_exists( ‘mc4wp_show_form’ ) ) {

Need help?

Please take a look at the MailChimp for WordPress knowledge base first. If you can’t find your answer there, please look through the MailChimp for WordPress plugin support forums or start your own topic.

More documentation

More detailed documentation can be found in the MailChimp for WordPress knowledge base.

How to display a form in posts or pages?

Use the [mc4wp_form] shortcode.

How to display a form in widget areas like the sidebar or footer?

Go to Appearance > Widgets and use the MailChimp for WP Form widget that comes with the plugin.

Where can I find my MailChimp API key?

You can find your MailChimp API key here

How to add a sign-up checkbox to my Contact Form 7 form?

Use the following shortcode in your CF7 form to display a MailChimp sign-up checkbox.

[mc4wp_checkbox "Subscribe to our newsletter?"]

The form shows a success message but subscribers are not added to my list(s)?

If the form shows a success message, there is no doubt that the sign-up request succeeded. MailChimp could have a slight delay sending the confirmation email though, please just be patient and make sure to check your SPAM folder.

When you have double opt-in disabled, new subscribers will be seen as imports by MailChimp. They will not show up in your daily digest emails or statistics. We always recommend leaving double opt-in enabled.

How can I style the sign-up form?

You can use custom CSS to style the sign-up form if you do not like the themes that come with the plugin. The following selectors can be used to target the various form elements.

.mc4wp-form { ... } /* the form element */
.mc4wp-form p { ... } /* form paragraphs */
.mc4wp-form label { ... } /* labels */
.mc4wp-form input { ... } /* input fields */
.mc4wp-form input[type="checkbox"] { ... } /* checkboxes */
.mc4wp-form input[type="submit"] { ... } /* submit button */
.mc4wp-alert { ... } /* success & error messages */
.mc4wp-success { ... } /* success message */
.mc4wp-error { ... } /* error messages */

You can add your custom CSS to your theme stylesheet or (easier) by using a plugin like Simple Custom CSS

I’m getting an “HTTP Error” when trying to connect to MailChimp

If you’re getting an HTTP Error when trying to connect to your MailChimp account, please contact your webhost and ask them if they have PHP CURL installed and updated to the latest version (7.40.x).
Also, please ask them to allow requests to https://api.mailchimp.com/.

How do I show a sign-up form in a pop-up?

We recommend the Boxzilla pop-up plugin for this. You can use the form shortcode in your pop-up box to show a sign-up form.

My question is not listed

Please head over to the MailChimp for WordPress knowledge base for more detailed documentation.


  1. Create beautiful sign-up forms that blend in with your theme.

    Create beautiful sign-up forms that blend in with your theme.

  2. Integrate with any other plugin out there.

    Integrate with any other plugin out there.

  3. Add a highly converting top bar form to your site.

    Add a highly converting top bar form to your site.

  4. Style your form with our Styles Builder (premium feature).

    Style your form with our Styles Builder (premium feature).

  5. Integrate your WooCommerce store with MailChimp (premium feature).

    Integrate your WooCommerce store with MailChimp (premium feature).

  6. Dive into detailed sign-up statistics (premium feature).

    Dive into detailed sign-up statistics (premium feature).

Other notes:

Latest Change log entry:


  • Dropdown fields with special characters were not properly passed to MailChimp.
  • Interest groups with an all-numeric ID were not properly passed to MailChimp.


  • Various minor code optimizations
  • Do not redirect when showing “already subscribed” warning.
  • Improved scroll to form handling after a form is submitted without AJAX.


email, mailchimp, marketing, mc4wp, newsletter

+ Jason's Comments

I use this plugin to integrate with Contact Form 7, giving people the option to subscribe to the Mailchimp mail-list, when filling out a form. If you have more than one list and more than one CF7 form, you need to read Knowlegde Base for Mailchimp plugin to know how to assign the sign up checkbox for a specific mail-list.