I have now successfully sent email from one #Tor .onion domain to another. :)
@lattera IMO it'd be cool if major websites supported registering with .onion email - this way you could really own your email address by having complete control over the hidden service keys.
@lattera because it's not like you can own a domain in the official ICANN hierarchy - you can only rent it. When you stop paying, it stops being yours. It's not just that it stops working, it's that anyone else can take it.