Title: MC4WP: Mailchimp for WordPress
Author: Danny van Kooten
Published: June 19, 2013
Last modified: June 22, 2026
---
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# MC4WP: Mailchimp for WordPress
By [Danny van Kooten](https://profiles.wordpress.org/dvankooten/)
[Download](https://downloads.wordpress.org/plugin/mailchimp-for-wp.4.13.1.zip)
[Live Preview](https://wordpress.org/plugins/mailchimp-for-wp/?preview=1)
* [Details](https://wordpress.org/plugins/mailchimp-for-wp/#description)
* [Reviews](https://wordpress.org/plugins/mailchimp-for-wp/#reviews)
* [Installation](https://wordpress.org/plugins/mailchimp-for-wp/#installation)
* [Development](https://wordpress.org/plugins/mailchimp-for-wp/#developers)
[Support](https://wordpress.org/support/plugin/mailchimp-for-wp/)
## Description
_Allowing your visitors to subscribe to your newsletter should be easy. With this
plugin, it finally is._
This plugins helps you grow your email list in Mailchimp. You can use it to create
good looking and accessible sign-up forms or integrate with any other existing form
on your WordPress site, like your contact, comment or checkout form.
#### Some (but not all) 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 build your forms using native
HTML.
* Seamless integration with the following plugins:
- WordPress Comment Form
- WordPress Registration Form
- Contact Form 7
- WooCommerce
- Gravity Forms
- Ninja Forms 3
- WPForms
- BuddyPress
- MemberPress
- Events Manager
- Easy Digital Downloads
- Give
- UltimateMember
- HTML Forms
- AffiliateWP
* Is the plugin you want to integrate with not listed above? You can probably still
use our [custom integration](https://www.mc4wp.com/kb/subscribe-mailchimp-custom-html-form/)
feature. Alternatively, the plugin comes with a PHP API to programmatically add
a new subscriber to Mailchimp.
* [Mailchimp for WordPress Premium](https://www.mc4wp.com/): Send your WooCommerce
orders to Mailchimp so you can see exactly what each subscriber purchased and
how much revenue your email campaigns are generating.
* A multitude of available add-on plugins and integrations:
- [Mailchimp for WordPress Premium](https://www.mc4wp.com/)
- [Mailchimp Top Bar](https://wordpress.org/plugins/mailchimp-top-bar/)
- [Boxzilla Pop-ups](https://wordpress.org/plugins/boxzilla/)
* Well documented through our [knowledge base](https://www.mc4wp.com/kb/).
* Developer friendly. For some inspiration, check out our [repository of example code snippets](https://github.com/ibericode/mailchimp-for-wordpress/tree/main/sample-code-snippets).
* Ready for PHP 8.5, but backwards-compatible all the way down to PHP 7.4.
#### What is Mailchimp?
Mailchimp is a newsletter service that allows you to send out email campaigns to
a list of email subscribers. It is free for lists with up to 500 email subscribers,
which is why it is the newsletter-service of choice for thousands of small businesses
across the globe.
If you are not yet using Mailchimp, [creating an account is 100% free and only takes you about 30 seconds](http://eepurl.com/igOGeX).
#### Support
If you need some help in setting up the plugin, you have various options:
* Search through our [knowledge base](https://www.mc4wp.com/kb/#utm_source=wp-plugin-repo&utm_medium=mailchimp-for-wp&utm_campaign=description).
* Open a topic in the [WordPress.org plugin support forums](https://wordpress.org/support/plugin/mailchimp-for-wp)
* If you’re a premium user, send an email to the email address listed inside the
plugin.
#### Translations
You can [help translate this plugin into your language](https://translate.wordpress.org/projects/wp-plugins/mailchimp-for-wp/stable/)
using your WordPress.org account.
#### Development
This plugin is being developed on GitHub. If you want to collaborate, please look
at [ibericode/mailchimp-for-wordpress](https://github.com/ibericode/mailchimp-for-wordpress).
#### Customizing the plugin
The plugin provides various filter and action hooks that allow you to modify or
extend the default behavior. We’re also maintaining a [collection of sample code snippets](https://github.com/ibericode/mailchimp-for-wordpress/tree/main/sample-code-snippets).
## Screenshots
[⌊Example sign-up form in the TwentyTwenty theme.⌉⌊Example sign-up form in the TwentyTwenty
theme.⌉[
Example sign-up form in the TwentyTwenty theme.
[⌊Example sign-up integration with a contact form.⌉⌊Example sign-up integration
with a contact form.⌉[
Example sign-up integration with a contact form.
[⌊Settings page to connect with your Mailchimp account.⌉⌊Settings page to connect
with your Mailchimp account.⌉[
Settings page to connect with your Mailchimp account.
[⌊Overview of sign-up integrations.⌉⌊Overview of sign-up integrations.⌉[
Overview of sign-up integrations.
[⌊Overview of sign-up forms.⌉⌊Overview of sign-up forms.⌉[
Overview of sign-up forms.
[⌊Settings page to configure an integration.⌉⌊Settings page to configure an integration
.⌉[
Settings page to configure an integration.
[⌊Page where you edit your sign-up forms.⌉⌊Page where you edit your sign-up forms
.⌉[
Page where you edit your sign-up forms.
[⌊Page where you modify your form messages.⌉⌊Page where you modify your form messages
.⌉[
Page where you modify your form messages.
[⌊Settings page for e-commerce integration with Mailchimp. Requires Mailchimp for
WordPress Premium.⌉⌊Settings page for e-commerce integration with Mailchimp. Requires
Mailchimp for WordPress Premium.⌉[
Settings page for e-commerce integration with Mailchimp. Requires [Mailchimp for WordPress Premium](https://www.mc4wp.com/).
## Blocks
This plugin provides 2 blocks.
* Form
* Campaigns
## Installation
#### 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 API key](https://admin.mailchimp.com/account/api) in the plugin settings.
#### Configuring Sign-Up Form(s)
1. Go to _Mailchimp for WP > Forms_
2. Select at least one list to subscribe people to.
3. _(Optional)_ Add more fields to your form.
4. Embed a sign-up form in pages or posts using the `[mc4wp_form]` shortcode or Gutenberg
block.
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 `mc4wp_show_form()` PHP
function.
#### Need help?
Please take a look at the [MC4WP knowledge base](https://www.mc4wp.com/kb/#utm_source=wp-plugin-repo&utm_medium=mailchimp-for-wp&utm_campaign=installation-instructions-link)
first.
If you can’t find an answer there, please look through the [plugin support forums](https://wordpress.org/support/plugin/mailchimp-for-wp)
or start your own topic.
## FAQ
### Where can I find my Mailchimp API key?
You can [find your Mailchimp API key here](http://kb.mailchimp.com/accounts/management/about-api-keys#Find-or-Generate-Your-API-Key)
### How to display a form in posts or pages?
Use the `[mc4wp_form]` shortcode or the Gutenberg block.
### 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.
### How to add a sign-up checkbox to my Contact Form 7 form?
Use the following shortcode in your CF7 form to display a newsletter sign-up checkbox.
```
[mc4wp_checkbox "Subscribe to our newsletter?"]
```
Our knowledge base has more information on [connecting Contact Form 7 and Mailchimp](https://www.mc4wp.com/kb/subscribe-mailchimp-contact-form-7/).
### 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 check again in a few minutes (sometimes hours) and don’t forget to check
your junk folder too.
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](http://blog.mailchimp.com/double-opt-in-vs-single-opt-in-stats/).
### 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](https://wordpress.org/plugins/simple-custom-css/#utm_source=wp-plugin-repo&utm_medium=mailchimp-for-wp&utm_campaign=after-css-link)
### How do I show a sign-up form in a pop-up?
We recommend the [Boxzilla pop-up plugin](https://wordpress.org/plugins/boxzilla/)
for this. You can use the form shortcode in your pop-up box to show a sign-up form.
### How do I subscribe from my WooCommerce checkout form?
You can use our WooCommerce integration for that. [How to subscribe to Mailchimp from the WooCommerce checkout form](https://www.mc4wp.com/kb/connect-woocommerce-store-mailchimp/).
### How to connect my WooCommerce store with Mailchimp?
You can find instructions for [connecting your WooCommerce store with Mailchimp](https://www.mc4wp.com/kb/connect-woocommerce-store-mailchimp/)
on our website.
### I’m getting an “HTTP Error” when trying to connect to Mailchimp.
the “HTTP Error” type is usually because of a firewall configuration issue or outdated
software on your web server.
Please contact your webhost and ask them to check the following:
* Whether remote HTTP requests to `https://api.mailchimp.com` are allowed.
* Whether cURL and the PHP-cURL extension are installed and updated to a recent
version.
### Where do I report security bugs found in this plugin?
Please report security bugs found in the source code of the Mailchimp for WordPress
plugin through the [Patchstack Vulnerability Disclosure Program](https://patchstack.com/database/vdp/8c215d34-dc57-4167-8af8-a9863cb63668).
The Patchstack team will assist you with verification, CVE assignment, and notify
the developers of this plugin.
### My question is not listed here.
Please search through our [knowledge base](https://www.mc4wp.com/kb/#utm_source=wp-plugin-repo&utm_medium=mailchimp-for-wp&utm_campaign=faq).
## Reviews
### [Simple and does the job](https://wordpress.org/support/topic/simple-and-does-the-job-52/)
[nschouinc](https://profiles.wordpress.org/nschouinc/) July 12, 2026
Connected my list in a few minutes, forms match my site’s styling without extra
tweaking, and double opt-in works as expected. No complaints so far.
### [Easy to use and beautiful too](https://wordpress.org/support/topic/easy-to-use-and-beautiful-too/)
[De Harris](https://profiles.wordpress.org/allbizweb/) June 25, 2026
We have been using MC4WP for almost a year now, and I am so pleased how it has been
working for us. It was easy to integrate and set up. No issues, so I highly recommend
you use it for your site.
### [Perfect](https://wordpress.org/support/topic/perfect-11004/)
[Nonos](https://profiles.wordpress.org/nonos/) June 9, 2026
Clean, stable and updated regularly
### [Great Plugin & Support](https://wordpress.org/support/topic/great-plugin-support-414/)
[James](https://profiles.wordpress.org/james-feaver/) April 16, 2026
I’ve been using this for a long time to add subscribers to Mailchimp both on a form
and in the Woocommerce checkout. I recently encountered a problem experimenting
with the Woocommerce block-based checkout and M4CWP support were great. Highly recommended
plugin.
### [Not Bad Option](https://wordpress.org/support/topic/not-bad-option/)
[Reyna](https://profiles.wordpress.org/reyna20/) April 8, 2026 1 reply
Tried Mailchimp for WordPress for my forms. It connects fine and does the basic
job. But the setup felt a bit confusing at times. Works ok overall, but could be
simpler and smoother.
### [Exactly does What we needed](https://wordpress.org/support/topic/exactly-does-what-we-needed/)
[Clark W](https://profiles.wordpress.org/clarkkwilliams/) April 6, 2026
Simple, powerful, and exactly what we needed. Solved our problem without the usual
headaches.
[ Read all 1,497 reviews ](https://wordpress.org/support/plugin/mailchimp-for-wp/reviews/)
## Contributors & Developers
“MC4WP: Mailchimp for WordPress” is open source software. The following people have
contributed to this plugin.
Contributors
* [ Danny van Kooten ](https://profiles.wordpress.org/dvankooten/)
* [ ibericode ](https://profiles.wordpress.org/ibericode/)
* [ Harish Chouhan ](https://profiles.wordpress.org/hchouhan/)
* [ Lap ](https://profiles.wordpress.org/lapzor/)
“MC4WP: Mailchimp for WordPress” has been translated into 33 locales. Thank you
to [the translators](https://translate.wordpress.org/projects/wp-plugins/mailchimp-for-wp/contributors)
for their contributions.
[Translate “MC4WP: Mailchimp for WordPress” into your language.](https://translate.wordpress.org/projects/wp-plugins/mailchimp-for-wp)
### Interested in development?
[Browse the code](https://plugins.trac.wordpress.org/browser/mailchimp-for-wp/),
check out the [SVN repository](https://plugins.svn.wordpress.org/mailchimp-for-wp/),
or subscribe to the [development log](https://plugins.trac.wordpress.org/log/mailchimp-for-wp/)
by [RSS](https://plugins.trac.wordpress.org/log/mailchimp-for-wp/?limit=100&mode=stop_on_copy&format=rss).
## Changelog
#### 4.13.1
_Release date: Jun 22, 2026_
* Forms: Improve handling of pasted `