The WooCommerce Cart Abandonment Recovery plugin provides a feature to recover your sales.
This feature requires sending emails that are scheduled at a specific time and are sent by the site host or the SMTP plugin if you are using it.
Here the Woocommerce Cart Abandonment Recovery plugin here does not send the actual email. So the Cart Abandonment plugin is not responsible if recovery emails are going to spam.
Why emails going to the spam folder of the receivers?
There could be many reasons for any email going to the receiver’s spam folder. You can check those reasons explained in detail in the following docs –
How to prevent the emails from going to receivers the spam folder?
Here is another doc that explains how to prevent the email from going to spam folder:
You can also contact your hosting provider for more information regarding this issue.