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mailchimpmailchimp-api-v3.0

Problem with synching customers with MailChimp through API v.3: Customer Was Not Saved

I am trying to synchronize customer entities of an online store with MailChimp e-commerce service. Most of them synched successfully, but some others failed. The response of API is as below:

{"status_code":400,"operation_id":"855","response":"{\"type\":\"http:\/\/developer.mailchimp.com\/documentation\/mailchimp\/guides\/error-glossary\/\",\"title\":\"Customer Was Not Saved\",\"status\":400,\"detail\":\"Customer could not be imported to the list associated with this store.\",\"instance\":\"\"}"}

I couldn't find any explanation for this error in official documentation.

Solution

  • I've posted a ticket in the MailChimp support system about my problem. This is their answer, just for the information of any other person facing this issue:

    1. The email address is blacklisted from signing up
    2. The email address is invalid
    3. The email address is not UTF-8 encoded
    4. The address was added to the list too many times in a short period of time