Google tries - but cannot. Ultimately it can only do the same dance that it does with spam. Learn, improve, tweak - and never succeed. I think a general projec

Google tries - but cannot. Ultimately it can only do the same dance that it does with spam. Learn, improve, tweak - and never succeed. I think a general project to explain encryption/signing would be awesome. I'd _love_ to send mails to my bank, to the government etc. and have them be legally binding. I'm sure it could help against quite some amount of spam as well, if you understand that an address isn't to be trusted by default. I .. don't get that last part. How do you think is the process of being able to authorize a 'from' number? Technically gazillion of services could probably do it. It's inherently simple if you are well-connected. Skype certainly doesn't need to ask you first and have a kind of exchange with you and your carrier that 'unlocks' their ability to use your number in an outgoing call. It's a policy that protects them from abuse (i.e. they care, because of legal implications and because of possible business impact if they'd abuse it). [1] They don't need to get your ok though, if they don't want to. 1: This is based on a limited experience in my past, where I had (legal) access to an asterisk server with a nice trunk connection to a mobile carrier in DE. I certainly don't have extensive telecom knowledge, but got a glimpse at least.