Khan Academy may, from time to time, send you email regarding our products and services, or products and services we think you may enjoy. Only Khan Academy (or our vendors or service providers operating on our behalf) will send you these emails. You can choose not to receive these emails by clicking the unsubscribe link in any e-mail or via your Settings page at https://www.khanacademy.org/settings/email. Please note that you are not permitted to unsubscribe or opt-out of non-promotional messages regarding your account, such as account verification, changes or updates to features of the Service, or technical or security notices.</p>