On 4/11/2014 2:28 PM, Matt Simerson wrote:
Altering a header (the "Envelope") is not the same as altering the message
(body).
The thing called the Header is part of the thing called the message, as
defined in rfc 5322.
The thing called the Envelope is the set of SMTP commands, as defined in
rfc 5321.
It's probably more accurate to say that the MLM is acting as an agent of the author.
(Now if you want to really pick nits, think about sending out a meeting invitation
through Exchange - there's a meeting "owner" - but other people, with
privileges, can update the original invitation - change the time, add a webex, ....)
I think you're conflating the message and the delivery mechanism. In the Exchange case, other
people generally only alter meta-data *about* the invitation (time, attendance status, etc.). The
invitation itself, "Meet the Engineering team and discuss appropriate uses of the From and
Reply-To headers" tends to not get altered by anyone other than the original author. Granted,
there are Personal Assistants and other privileged persons often write "in the name of"
the Author, but that's another matter entirely.
A mailing list takes delivery of the message and posts a new one. In
formal terms, the mailing list is the 'sender'. That doesn't mean it is
the 'author' but it could.
Take a look at RFC 5598, Internet Mail Architecture. All of this is
formalized.
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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