On Wed, Mar 25, 2015 at 04:32:03PM +0100, Pieter Lexis wrote:
> Now, the IETF has standardized a mechanism to do discovery like this in
> the form of webfinger, RFC7033[1]. This would allow an MTA/MUA to lookup
> the full recipient address (in the format given by the end user) at the
> webfinger server of that domain. This server could do the
> casefolding/aliasing using the defined 'aliases' field in the response body.
THe problem with canonicalizing addresses (akin to EXPN) is that
most sites simply won't want to publish this data. Returning a
key is very different from returning a "canonical address".
Any alternative protocol should just return the SMIME or PGP key
for the address, and avoid returning any intermediate "canonical"
addresses used to locate those.
--
Viktor.
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