Clearout is a great way to protect your sender reputation for email marketing. It detects and removes known abuse and spam trap emails, temporary addresses, invalid, syntax errors, toxic and catch-all domains. It's a powerful tool for improving your deliverability, and it also offers you data about your subscribers that can be valued in marketing reports: it appends first & last name, gender, organization & location. Clearout is a fast and easy to use email validator, & it also includes an API.