Go to the addons menu inside the Google Spreadsheet, choose Email Address Extract and click Start to launch the extractor addon. Specify the search criteria and all emails that match the rule will be parsed by the extractor. You may use any of the Gmail Search operators to filter messages. Are email extractors legal? Email extractors are bad for you, these tools are also illegal and you can be penalized for using them. In your quest to reach a mass of people, don't compromise on quality. How does email extractor work? How Does It Work? Email Extractor is designed to automatically extract email addresses from the web and your local files, and compile them to a list eliminating duplicate email addresses. The program features a powerful engine, which makes Email Extractor the fastest email harvester. Should email addresses email separator In most email programs, it's common practice to separate the names of email recipients with commas. However, in Outlook, the semicolon is used to separate email recipients. If you'd rather use a comma, change the Outlook settings.