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Re: Email Forwarder's Protocol ( EFP )

2005-02-22 19:31:15
At 01:24 AM 2/23/2005 +0100, Alex wrote:

Trace headers have a long history...  Are you sure this is "new" ?

Using Received: headers is certainly a possibility, but I think there may be a problem with too many variations in existing formats, and the need to cram in more information to support authentication protocols. As I understand it, the format of the these headers is not adequately standardized. If we try to define it more precisely, we may break existing programs.

RFC2822 defines the Received header as follows:
received  =  "Received:" name-val-list ";" date-time CRLF
I can't find anything further on the details of the name-val-list. Has this been formalized in some other document?

I assume the reason people developed new headers like Received-SPF was to avoid these problems.

-- Dave



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