Mailchimp error: Invalid Resource - Please provide a valid email address

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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 "Invalid Resource - Please provide a valid email address". 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 does not contain a valid email address.
The mapped field contains more data than just an email address, such as the email address and a telephone number.

How to fix it

To fix this issue:

If the issue only occurs when you test the step, change the value to provide a valid email address.
If the mapped field contains more information than just an email address, add a Formatter step after it to:
- Extract the email address or,
- Split text to isolate the email address.
If the mapped field contains data in an unexpected format, you can use regular expressions (regex) to extract the email address.
Before continuing to your Mailchimp step, add a filter to your Zap to ensure an email address exists in the field.

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: Invalid Resource - Please provide a valid email address

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Causes

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