To automatically send your new emails to Klaviyo, just follow these steps:
Step 1: Log into your Klaviyo account.
Step 2: In the upper right menu, click "Account"
Step 3: In the upper menu, click "Settings" and "API Keys"
Step 4: Click "Create API Key"
Step 5: Copy the API key
Step 6: Log in to your WisePops account
Step 7: Open or create a popup with a sign-up form
Step 8: Click on your sign-up form.
Step 9: In the left menu, click "Sync"
Step 10: Click on the Klaviyo icon
Step 11: In the pop-up window, paste your API key and click "Submit".
IMPORTANT: make sure the key doesn't include any extra space at the end.
Step 12: In the list menu, choose which list you'd like new subscribers to join.
You're done! :)