Log in to your Campaign Monitor account

Click on your profile picture at the top right corner

Choose Account Settings.
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Click on API Keys.
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Click on the Generate API key and fill in the login password.
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Open the Email Opt-in module Settings modal window.

Go to the Content Tab → Email Account.

Select the Campaign Monitor from the provider's list.

Set a name for your account. This can be anything you want. You can use, for example my-campaign-monitor

Paste the Campaign Monitor API Key
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Click on the Submit button.

Choose the Campaign Monitor list you want to use.
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