Check out Firefox Relay and the corresponding Firefox extension. You can pre-register some-random-string@mozmail.com, which will forward e-mail to your actual a

Check out Firefox Relay and the corresponding Firefox extension. You can pre-register some-random-string@mozmail.com, which will forward e-mail to your actual address. If you pay for it, you'll have your-own-subdomain.mozmail.com, which acts as a catch-all, and you can use without pre-registering any-address@your-own-subdomain.mozmail.com. You can reply from all addresses described above. The FF extension makes pre-registration of random addresses a little easier by putting a button on e-mail form fields. There isn't convenient integration with password managers, that I know of. You could be de-anonymised. Particularly by correlating your sign-ups using your-own-subdomain.mozmail.com. Or if the service is hacked. There's some argument that makes this service harder to generate spam with, and therefore less likely to be blocked. That's yet to be seen, I suppose.