Yes, emails create backlinks. In fact, they are one of the most common ways to create them. When you send an email to someone and include a link to your website, that person may click on the link and visit your site. If they like what they see, they may then decide to add a link back to your site from their own website. This helps improve your search engine ranking because it tells Google that people are finding your site useful and are linking to it from their own sites.