I use something similar already. I've a domain that is used purely for my email. Normal addresses like webmaster@ are rejected. A script on the server takes the

I use something similar already. I've a domain that is used purely for my email. Normal addresses like webmaster@ are rejected. A script on the server takes the domain I am registering for a service on (eg "google.com"), generates an random-looking but deterministic address, and creates an alias for that address to my real inbox. End result is that everyone gets a unique email that can't be guessed, I can nuke an address as soon as it starts sending me spam (often) and my true inbox is typically completely clean. I initially made the mistake of trusting my bank and utility billing systems with my real address. Turns out my power company had their database compromised, and when I called to inform them they refused to believe me (like Dropbox).