Use our latest email extractor lite 1.4, 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.