It seems like this would also be useful for proving contracts/statements over email in business law. While it may not have been designed for this purpose (and t

It seems like this would also be useful for proving contracts/statements over email in business law. While it may not have been designed for this purpose (and there could still be claims that the sending account was hacked, unlike a personal GPG key which identifies the individual rather than the infrastructure), it seems to be a pretty good thing to have.