Recipient-Domain-Mismatch Mailchimp

Question

I'm currently trying to send e-mails with Mailchimp and have a verified example.com domain. The issue being that I try sending an email from no-reply@example.com to a list of emails with domains like gmail.com or outlook.com but Mailchimp returns a recipient-domain-mismatch error. Is there a configuration or extra step to allow sending emails to other domains?

Full request

{
    "key": "**********************",
    "message": {
        "html": "content",
        "subject": "subject",
        "from_email": "no-reply@example.com",
        "to": [
            {
                "email": "client@gmail.com",
                "type": null
            }
        ]
    }
}

Full response

[
    {
        "email": "client@gmail.com",
        "status": "rejected",
        "_id": "********************************",
        "reject_reason": "recipient-domain-mismatch"
    }
]

Answer 1

Reason for this error could be:

You are currently on a free plan so you are not allowed to send emails to addresses outside your verified domain. The restriction is lifted when upgrade to a paid plan.

Check the limitations of a demo plan on mailchimp's Transactional Email Demo article.