Easy WordPress Mailchimp Integration

Remi | June 19, 2012 | in Free

I created a simple plugin called Easy WordPress Mailchimp Integration that simply adds a nice registration process to your Mailchimp mailing lists during WordPress user registration. Thats simple but so useful! You can customize the message that is displayed on the form registration, and well, that’s it! You can also view in users list users registered to one of your mailing list…. I hope you’ll like it!

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The author

About the author Remi: Hey! My name is Rémi Corson, i'm a WordPress Expert Developer, i create high level themes and plugins, and i provide free stuff every week on this website!


    1. Rémi Post author

      Hi, the double optin can be configured directly into Mailchimp settings, and can’t be bypassed by third applications. Just go to your campaign settings and uncheck the corresponding option!

  1. Luc


    I’ve got a mailchimp account and within a form with some fields (name, school, phone, address, …).
    Is it possible to fill in the mailchimp form AND also been registered to WordPress?


  2. Shane

    I have added your plugin and it works! The only thing is the first and last name fields are not forwarding to Mailchimp. The set up is pretty easy. Can you offer any advice or suggestions? Tks.

  3. Stephen

    For some reason my subscription list in Mailchimp is not being updated with a new subscriber. In Users, I can see a Yes under Mailchimp. I was trying other mailchimp plugins but deactivated all of them in case that was a problem but still it doesn’t work.

    Also, why doesn’t the default mailchimp list show on the Register page? Is there any way to make it show, given that I can get the plugin working?

  4. Juanita

    Hi. I got this error when registering on wordpress 3.2.1
    Warning: trim() expects parameter 1 to be string, array given in /***/public_html/wp-content/plugins/easy-wordpress-mailchimp-integration/easy-wordpress-mailchimp-integration.php on line 183

  5. Brian

    Hi Remi,

    I’m probably doing something really stupid but I have activated the plugin on my site, added in the API so that I can see the MailChimp default list but I cannot then find a widget or another way to put the plugin on to my site, or have I completely misunderstood how the plugin works…?



    1. Rémi Post author

      Hi Brian,

      there’s no widget, actually you don’t have to anything else because the plugin on creates a dropdown list on the registration page, the default one. Try to logout from the admin, go to yoursite.com/wp-admin and click on “Register” (please make sure that registration is enable on your website), and when you’ll arrive on the registration page you’ll see the dropdown list.

  6. Sharon

    Two questions:

    I have installed the plugin, added my API – cut and pasted from MC and my default list is not showing and if I try to save anything I get “cheatin eh?” message.

    When someone subscribes do they get the full MC registration form or just name/email – and if it’s just name/email how do I get the rest of the info from my subscriber.

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  8. Claudio

    Is possible modufy the plugin and have the ability for administrator to choose if the user can registrate 1, 2 or more lists?

    I mean can administrator can choose the maximun number of list that a user can registrate


  9. Phillip

    Great plugin for the mailchimp integration. I have a question though. Is there an easy way to allow people to choose which segment they want to subscribe too? I have 3 choices.


  10. justin

    Hey, just installed this plugin. Looks really good! When my users register and try to subscribe to a mailchimp list the following message appears (note that their user/subscriber account in wordpress still gets created, but they don’t get subscribed to the MailChimp list)…

    Warning: trim() expects parameter 1 to be string, array given in /home/sfyadmin/public_html/wp-content/plugins/easy-wordpress-mailchimp-integration/easy-wordpress-mailchimp-integration.php on line 183

    Warning: trim() expects parameter 1 to be string, array given in /home/sfyadmin/public_html/wp-content/plugins/easy-wordpress-mailchimp-integration/easy-wordpress-mailchimp-integration.php on line 183

    Warning: Cannot modify header information – headers already sent by (output started at /home/sfyadmin/public_html/wp-content/plugins/easy-wordpress-mailchimp-integration/easy-wordpress-mailchimp-integration.php:183) in /home/sfyadmin/public_html/wp-includes/pluggable.php on line 876

    Help?? Have I done something wrong?


  11. Scott Atwood

    Hello Remi,
    I’m hoping you can help me. On my site I have your plugin set up. You see the drop down and can select the mail list (I only have one) during registration. For some reason though the email is not being forwarded to my Mailchimp list. I have the API set up and I believe everything is done correctly. When I look at the Users list on my site I see the Mailchimp column and the Yes for users who signed up. Any idea why it wouldn’t be populating?

    Thank you,

  12. Lee Dworshak

    Same request as Astrid. See string below please.

    2012-11-01 03:13:41 Reply
    How do you hide lists and only show 1 list (no option)

    2012-11-01 09:50:36 Reply
    Hi, the plugin doesn’t allow such thing, but you can easily add this witha few lines of PHP.
    2012-11-08 05:00:41 Reply

    is there any way you can help with it?
    I want the users to be automatically subscribed to 1 specific list
    Is it possible?
    Thanks in advance!

    2012-11-08 09:54:08 Reply
    Hi Astrid, you’ll need to modify the plugin core files to allow this. Maybe i’ll add this feature to a next update, but i can’t promise.

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