In article <[email protected]> you write:
>On Mon, Jan 14, 2019 at 02:48:58PM -0500, John Levine wrote:
>
>> Today's question: I would like to log the SNI in the Received header.
>> Where should I put it?  
>> 
>> One possibilty would be to use the SNI name as the by-domain in the BY
>> clause, but that makes it hard to tell that the name came from SNI
>> rather than by default.  I suppose I could put it in a comment but
>> that's ugly.  In retrospect, RFC8461 should have added an SNI clause
>> to Received, like RFC 8314 added tls and group clauses.
>
>FWIW, Postfix puts TLS connection details in comments:

That's not wrong, but now that RFC 8314 has defined the tls clause, why
not put the data where the spec says?  If you have more than what 8314
includes, put the rest in a comment but at least we can parse the stuff
that meets the spec.

R's,
John

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