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Re: [Nmh-workers] Changes to post

From: Paul Fox
Subject: Re: [Nmh-workers] Changes to post
Date: Mon, 12 Mar 2012 09:10:20 -0400

ken wrote:
 > So here's what I came up with:
 > - Reject drafts that don't have a From: header (this was non-controversial
 >   as I recall).
 > - Allow a Sender: header in the drafts (previously post would reject
 >   drafts that had one; I assume that's because post had it's own idea
 >   what your "real" address was).
 > - _Require_ a Sender: header in your draft if you have multiple addresses
 >   in your From: header.  This is actually required by the RFCs, although
 >   in my limited tests it seems that this restriction is not enforced.
 >   But we should still make sure we're not sending out email that is
 >   broken (okay, we do that today for other things, but hey, that's no
 >   excuse for making it worse).
 > - Create a new draft header called Envelope-From: (not copied into the
 >   outgoing message).
 > - Choose your SMTP envelope header out of the following list (starting
 >   with highest priority).
 >   1) Envelope-From:
 >   2) Sender:, iff you have multiple addresses in From:
 >   3) From:

can i propose a slight loosening of all this?  i like the idea
of the Envelope-From: header for specifying the SMTP header, and in
my mind the only reason for the Sender: header is because the RFC
requires it -- it adds no value for most people otherwise.  so:

    - Require a From: header in the draft.
    - Create a new, optional, Envelope-From:, and allow it in the draft.
    - Allow a Sender: header in the draft
(nothing changed so far)
    - if there are multiple addresses in From:, then require at least
        one of Envelope-From: or Sender:.  create a Sender: from
        Envelope-From: if necessary, to satisfy the RFC.
    - Choose the SMTP envelope header from
        1) Envelope-From:
        2) Sender:   (no "iff" -- i don't think there's a need for that)
        3) From:

this would let most people forget all about Sender: if they choose
to (while still satisfying the RFC), and it creates a new means of
easily forcing the return address for bounces on mail with any number
of addressess in the From:  line.

 paul fox, address@hidden (arlington, ma, where it's 43.0 degrees)

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