There’s no Velo API to do this.
You can vote for this request here: https://support.wix.com/en/article/request-notification-when-someone-opens-an-email
Or submit an API request to the Velo Wishlist: https://www.wix.com/velo/wishlist
There’s no Velo API to do this.
You can vote for this request here: https://support.wix.com/en/article/request-notification-when-someone-opens-an-email
Or submit an API request to the Velo Wishlist: https://www.wix.com/velo/wishlist