Hi Wei,

--On September 14, 2014 at 1:21:19 AM -0700 Wei Chuang <[email protected]> wrote:

* Mechanism for discovering recipient encryption preference, format
support (PGP/SMIME), algorithm support and encryption key


Two ideas:
1) DNS (either new TXT entry or new record type)
2) EHLO SMTP extension

What about Webfinger - RFC7033?


--
Cyrus Daboo

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