[kukkeliskuu]

Yup. And I don't think I would care too much about the actual domain, because, well, it would be a throwaway domain. It could be some random characters even. Which means you could possibly buy very cheap domain names in bulk, and re-sell them with low retail price, and profit the difference. The temp email service that you would provide "for free" would be the reason to buy from you.

[TemporaryMail]

Got it, this could perhaps work and the downside would however be that the user wouldn't have complete control over the domain, unless DNS control is provided and before I can say the word, I'd be a domain name registrar.

I think it's cool idea though and I might give this a shot, thanks for the idea and if I do implement this then feel free to contact me through the form and I'll set "lifetime" account up for you!