Dan Wing writes:

 > On an outgoing request containing an e164-style URI in the From:
 > (or PAI, as you prefer), the domain additionally places the user's 
 > email-style URI into a new header (let's call it "email-identity").
 > It determines the mapping between a user's E.164 URI and email URI
 > using a flat database (example: +14085551234 -> [EMAIL PROTECTED]).

my proxy is currently is using P-Preferred-Identity header for that
purpose.  why is a new header needed?

-- juha
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