On 7/8/14 12:53 PM +0900, Hartmut Figge wrote:
Trane Francks:
My outbound mail all utilizes the X-Mailer header. It's worth noting
that neither 'User-Agent" or "X-Mailer" are specified in RFC 5322. As
such, it's perhaps less than kind to consider SM to be deteriorated when
the inclusion of either header is purely optional and in no way
addresses any particular RFC. At least, as far as I can recall.
Then why show the User-Agent in the header pane at all? ;)
Because it's informational, obviously. There is, of course, a difference
among mandatory, optional and extraneous information. RFCs define the
first two, generally speaking, with additional headers allowed for
purely informational purposes.
Formerly at least X-Mailer was handled, maybe more notations also. I
didn't notice until today what had happened, because of Mnenhy.
Hartmut
X-Mailer is still there, so I don't know what you mean by formerly
handled. It's up to the receiver what to do about such a header and,
basically, the user agent is meaningless as long as the structure of the
received mail adheres to RFCs.
--
/////////////////////////////////////////////////////////
// Trane Francks tr...@tranefrancks.com Tokyo, Japan
// Practice random kindness and senseless acts of beauty.
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