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The Rules Engine

Change sending behavior based on conditional rules that you create.

Build an API Plugin

Create a plugin to extend the functionality of the Open Commerce API.

Contributing to Open Commerce

Learn how to contribute to Open Commerce.

Mailchimp Open Commerce (formerly Reaction Commerce)

Product capabilities and documentation of Mailchimp Open Commerce.

Manage Contacts and Events with the Mobile SDK

Create and update contact information and events with the Mailchimp Mobile SDK.

Mailchimp for Developers

Find all the Mailchimp API documentation and tools developers need to send marketing and transactional emails.

Reputation and Rejections

Understand bounces, spam complaints, and other factors that determine account reputation.

Fundamentals

Learn the basics to start sending with Mailchimp Transactional.

Mailchimp Transactional

Learn how to use Mailchimp Transactional to send targeted and event driven messages to anyone, fast—with best-in-class deliverability.