Mailchimp error: Required field "Subscriber Email" (email) is missing

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Updated at August 20th, 2025

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Causes How to fix it Still need help?

When using the Mailchimp Add/Update Subscriber action in your Zaps, you see the error message "Required field "Subscriber Email" (email) is missing". You may see this error when setting up a Zap or in the details of a Zap run in your Zap history.

Causes

This happens when:

The mapped field from the previous step did not return a value.
The mapped field contains invalid data, such as text that does not conform to the expected email address format.

How to fix it

To fix this issue:

Ensure the selected mapped field contains a valid email address during each Zap run.
If the mapped field lacks data, substitute it with a field that reliably provides a valid email address.
If you cannot change the current mapped field, add conditional logic using a filter or branching logic with paths to your Zap. This will allow you to define what the Zap should do if the mapped field receives no data from the previous step.

Still need help?

If this article did not fix the issue, Zapier has a few other options to get you the help you need:

Contact Zapier Support. Our Support team can investigate your account to find solutions.
Ask in the Zapier Community. Get advice from experienced Zapier users in the Zapier Community.
Learn more about getting help. Read our guide on how to get help and support with Zapier to find the best resources for your specific problem.

Mailchimp error: Required field "Subscriber Email" (email) is missing

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Causes

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