Hi there,
Thank you for reaching out, and we’re sorry to hear that your customers are receiving multiple emails.
We have tested the same flow on our end and observed that only a single email is triggered when a customer subscribes to an out-of-stock product, and similarly, only one email is sent when the product is back in stock. You can check here.
Since your email logs confirm that multiple emails are being sent from your site, this may be specific to your current setup. To help isolate the cause, we kindly request you to temporarily deactivate all plugins except WooCommerce and Notifima, and switch to a default theme such as Twenty Twenty-Five or Storefront. After doing so, please check the email flow again.
If the issue still persists with only the required plugins and a default theme, please let us know. We will be happy to assist you further in investigating and resolving the issue.
