[Email-SIG] Append behavior of __setitem__

[Tony Nelson]

At 17:57 -0400 04/10/2009, Barry Warsaw wrote:
 ...
>So I'm just starting to read RFC 5322 and I'm starting by skimming
>over Appendix A (differences between RFC 5322 and 2822).

Oh, bother!

>I see this:
>
>26.  No multiple occurrences of fields (except resent and received).*
>
>Which i find very interesting, and possibly relevant to the discussion
>about changing the semantics of Message.__setitem__() to not append to
>the list of headers, as well as some of the other semantics of message
>headers (e.g. get_all()).

Thank you for mentioning this.  Darn it.
-- 
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