WooCommerce MailChimp

WooCommerce MailChimp
September 7, 2016 Saint Systems
WooCommerce MailChimp

WooCommerce MailChimp
The WooCommerce logo and MailChimp logo are trademarks of Automattic and MailChimp respectively.

WooCommerce MailChimp provides simple MailChimp integration for WooCommerce. It allows you to quickly integrate your WordPress WooCommerce store with your MailChimp email marketing lists.

Key Features

  • Easily add all customers who purchase products to a designated MailChimp list.
  • Optionally, add customers to MailChimp interest groups.
  • Multiple double opt-in settings for international anti-spam compliance.
Download for Free on WordPress.org


  • WooCommerce 2.2+
  • WordPress 3.5+
  • PHP 5.4+
IMPORTANT: You must upgrade to version 2.X by December 31, 2016 as prior versions of the MailChimp API will stop working at that point.

2.0.18 - September 23, 2016

  • Fix for array_filter not working with lamda for some users.

2.0.15 - 2.0.17 - September 22, 2016

  • Fix for activation error running migrations.
  • Double opt-in fix.
  • Added additional hooks and filters.
  • Code cleanup.

2.0.13 - 2.0.14 - September 20, 2016

  • Added plugin compatibility checks for minimum supported versions of WooCommerce, WordPress and PHP.
  • Added explicit plugin directory to require_once calls.

2.0.9 - 2.0.12 - September 19, 2016

  • Small fix for double-loading of lists on api key change.
  • Small fix for lists not loading after initial save on new installs.
  • Small fix for new installs not loading interest groups.
  • Removed functions.php file (no longer used).

2.0.7 - 2.0.8 - September 17, 2016

  • Fix for new installs to prevent trying to run upgrade process.
  • Small fix to not end WooCommerce Settings section with no api key or list is present.

2.0 - 2.0.6 - September 16, 2016

WARNING: This release contains breaking changes to the plugin\'s action hooks and filters. If you have custom code that hooks into the plugins action hooks and filters, please review the breaking changes below to know how to update your code appropriately. Breaking Changes
  • Action filter ss_wc_mailchimp_subscribe_merge_vars is nowss_wc_mailchimp_subscribe_merge_tags
  • MailChimp Groups now have their own action filterss_wc_mailchimp_subscribe_interest_groups
  • Action filter ss_wc_mailchimp_subscribe_options has changed due to changes with the MailChimp API v3.0.
    • The key listid has been changed to list_id in the $subscribe_optionsparameter
    • The vars key has been removed from the $subscribe_options parameter (this key previously contained the merge tags and groups together).
    • The update_existing, replace_interests and send_welcome keys have been removed from the $subscribe_options parameter since they are no longer supported by the API.
    • The plugin now always updates existing subscribers if they exist.
    • The plugin now always appends interest groups and does not affect existing groups on subscribers.
    • The send welcome email can be configured on the target list and is not required to be sent through the API.
    • A new key merge_tags has been added and includes the $merge_tags array to be sent to the MailChimp API
    • A new key interest_groups has been added and includes the $interest_groupsarray to be sent to the MailChimp API
  • Added ability to pick MailChimp Interest Groups from drop-down list.
  • Upgraded MailChimp API to v3.0
  • Added Debug Log setting to enable/disable logging for troubleshooting purposes.
  • Added System Info setting for troubleshooting purposes.
  • New action hook ss_wc_mailchimp_loaded fired after the plugin has loaded.
  • New action hook ss_wc_mailchimp_before_opt_in_checkbox fired before opt in checkbox is rendered.
  • New action filter ss_wc_mailchimp_opt_in_checkbox allows for overriding opt in checkbox rendering
  • New action hook ss_wc_mailchimp_after_opt_in_checkbox fired after opt in checkbox is rendered.
  • Fixed issues with translations and text domains not loading properly.
  • Change list function to get_list to prevent PHP error
  • Fix issues with PHP version < 5.5

1.3.9 - September 13, 2016

  • Rename MCAPI class to prevent collisions with other plugins.

1.3.8 - September 9, 2016

  • Tested up to WordPress 4.6.1
  • Tested up to WooCommerce 2.6.4
  • More flexible opt_in checkbox placement
  • Pass $order_id to ss_wc_mailchimp_subscribe_options hook
  • Use only one instance of MCAPI
  • Fixed Issue #14 MCAPI constructor style
  • Fixed Issue #15 mailchimp_api_error_msg
  • Fixed Issue #16 where lists wouldn\'t show up until you saved the settings twice

1.3.7 - December 16, 2015

  • WordPress 4.4 Compatible
  • WooCommerce 2.4.12 Compatible
  • API response not shown in debug log
  • Use only one instance of MCAPI

1.3.6 - February 9, 2015

  • Backout of change to use WC_Logger due to fatal error

1.3.5 - February 6, 2015

  • Change to use WC_Logger instead of error_log
  • Updated pot file
  • Added French translation
  • General code syntax cleanup
  • Fix for undefined variable list and array_merge issue.

1.3.3 & 1.3.4 - January 16, 2016

  • Fix enabled check. Issue #6.
  • Fix for transient key length.
  • Tested with WordPress 4.1

1.3.2 - November 4, 2014

  • Fix for headers already sent message. Tested with WordPress 4.0 and WooCommerce 2.2.*

1.3.1 - April 3, 2014

  • Fix for MailChimp merge vars bug introduced in v1.3

1.3 - April 1, 2014

Breaking Changes
  • Action filer ss_wc_mailchimp_subscribe_merge_vars now passes $order_id param to enable retrieving additional order info/meta to use in MailChimp merge vars
  • Small fix to order_created subscribe event to work with PayPal Payment Gateway

1.2.6 - February 28, 2014

  • Added additional debug logging when WP_DEBUG is enabled

1.2.5 - February 27, 2014

  • Bug fix for subscribe when not using opt-in display field

1.2.2, 1.2.3 & 1.2.4 - February 22, 2014

  • WooCommerce 2.1 fix for order custom fields
  • Fixed plugin settings link for WooCommerce 2.1
  • Bug fix for subscribe

1.2.1 - February 13, 2014

  • WooCommerce 2.1 integration: Change to use wc_enqueue_js instead of add_inline_js
  • WooCommerce 2.1 integration: Change to support new default checkout field filter for default opt-in checkbox status

1.2 - January 10, 2014

  • Added new setting to control whether or not the double opt-in checkbox is checked/unchecked by default on the checkout page.
  • Added new setting to control display location of the double opt-in checkbox (under billing info or order info)
  • Small modification to append to MailChimp interest groups for existing users so that group settings are not lost for users who were already subscribed.
  • Preparations for i18n (Internationalization) support. Several users have already asked and offered to translate the plugin into other languages. We had always planned on that, but now are making that a reality.

1.1.2 & 1.1.3 - January 2, 2014

  • Update to REALLY address issue with subscriptions not occurring on order create \"pending\"
  • Minor action hook change since order meta (needed for MailChimp API call) is not yet available on \'woocommerce_new_order\' hook

- January 2, 2014

1.1.1 - December 31, 2013

  • Update to address issue with subscriptions not occurring on order create \"pending\"

1.1 - November 12, 2013

  • Add the option to display an opt-in field on checkout

1.0.2 - October 16, 2013

  • Minor text and comment changes

1.0.1 - October 11, 2013

  • Added \"Settings\" link on the Plugins administration screen

1.0 - October 10, 2013

  • This is the first public release.

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