YOPmail provides free, web-based disposable email inboxes accessible without registration. Pick any inbox name at @yopmail.com (or use alternate domains and the random address generator) and read mail instantly in the browser. Inboxes are not password-protected and messages are kept for 8 days by default. Inbox names persist on the service (YOPmail notes inboxes "already exist" and are not deleted), so choose unique names or use aliases for extra privacy. You can reply to messages and send to other YOPmail addresses; sending anonymous emails to external mailboxes is prohibited. Useful for sign-ups, testing, and avoiding spam but not suitable for sensitive or confidential communications. The site is donation-supported and displays a consent/advertising partners banner (tracking/analytics present).

Key features:

No registration or password required; open any inbox by name.
Messages retained 8 days; manual deletion is possible.
Random address generator, alternate domains, and aliases for added privacy.
Reply capability and YOPchat; external anonymous sending blocked to prevent abuse.
Free to use; privacy caveats mean avoid using for sensitive data.