Disposable email addresses work by generating a temporary inbox that you can use for a short time—usually to receive verification emails, one-time codes, or sign-up confirmations. When you visit a service like Mailcheap, it instantly gives you a random email ID. Any emails sent to that ID are displayed publicly or privately on the same site, depending on the platform. You don’t need to sign up or provide personal information. Once you're done using it, the email address becomes inactive or gets automatically deleted after a set time. This helps keep your real inbox clean and protects your privacy online.