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Trigger Slack Messages when New Mailchimp Subscribers Join

Updated on:
May 12, 2026
By:
Madhav Bhandari
Use this interactive demo to learn how to automatically send Slack messages when new Mailchimp subscribers join.

Quick summary

This tutorial shows how to build a Zapier automation that sends a Slack message every time a new Mailchimp subscriber is added to your list. By connecting Mailchimp as the trigger and Slack as the action, you can keep your team instantly informed about new email signups without any manual effort.


Steps

  1. Click "Create" and select "Zaps" to begin the automation process.
  2. Click "Trigger" to set up the starting point of your Zap.
  3. Search for and select Mailchimp as the trigger app.
  4. Choose "New Subscriber" as the trigger event.
  5. Connect your Mailchimp account to authorize access.
  6. Choose the Mailchimp list where new subscribers are added.
  7. Run a test to confirm the Mailchimp trigger is working correctly.
  8. Add Slack as the Action App in your Zap.
  9. Select an action event for the Slack step (e.g., Send Channel Message).
  10. Connect your Slack account to authorize access.
  11. Choose the Slack channel and customize the message to include subscriber details such as name, email, and date of subscription.
  12. Run a test to verify the Slack action sends correctly.
  13. Click "Publish" to turn on your Zap and activate the automation.

📌 Why this matters

Connecting Mailchimp and Slack through a Zapier automation eliminates the need to manually monitor new email subscribers, ensuring your marketing or sales team receives real-time Slack notifications the moment someone joins your list. This kind of no-code workflow automation helps growing teams stay aligned on lead activity without switching between platforms. By triggering instant Slack messages for every new Mailchimp subscriber, businesses can act faster on new contacts, improve team visibility, and accelerate follow-up processes. Zapier's Mailchimp-to-Slack Zap is an essential automation for any team that relies on email marketing and team messaging to drive engagement.
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