Hey,
Just wanted to point out that UTA has recieved a draft that's very
interesting (and IMHO more valuable than anything that relies on DNSSEC)
- it defines an extension to SMTP and SUBMISSION for querying e-mail
address related information (e.g. PGP keys), and may be used to
authenticate afterwards:
https://tools.ietf.org/html/draft-moore-email-addrquery-01
I've read the document (though only skimmed a few sections) and it looks
very promising if you ask me. I couldn't come up with any attack and it
seems to be implementable rather painlessly.
Aaron
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