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RFC2821bis-01 Issue 5: Syntax of ID clause in Received trace header

2007-03-22 20:26:21

In Section 4.4 on Trace Information, the "ID" clause of the Received field is defined as

        ID = CFWS "ID" FWS String / msg-id

This is claimed to be inconsistent with RFC 2822, which only permits msg-id.

"String" is there to provide additional flexibility for gateways, etc., for which a message-ID format may not be appropriate, but it has been suggested that we remove it in the interest of consistency.

Question: Is the production correct as is, or should "String" be eliminated as a possibility?

Note that, if the answer is "ok as is", we may want to think about whether we are happy with the syntax in in 2822.