InboxBurn

InboxBurn gives you a disposable email address you can use right away, with no registration. It helps you protect your real inbox from spam, ads, and unwanted newsletters. The address stays active for 24 hours, then it is automatically deleted. You can also create a custom address, receive attachments, and use the service for things like signups, free trials, OTPs, and testing. The core service is free, and there is also a paid API tier for developers who need higher rate limits.