KWFinder is definitely not a free seo tool anymore. They’ve even restricted their free access which they were providing earlier. So, that needs to be updated. Plus, you Chucho filter the results by type and department so that you only see the email addresses you need for your campaign. https://socialtechnet.com/story3003612/google-seo-software-no-hay-m%C3%A1s-de-un-misterio