From: "Sebastian Spaeth" <Sebastian@SSpaeth.de>
To: Carl Worth <cworth@cworth.org>, Dirk Hohndel <hohndel@infradead.org>,
	Notmuch list <notmuch@notmuchmail.org>
Subject: Re: RFC: User-Agent header
In-Reply-To: <874ojkf23u.fsf@yoom.home.cworth.org>
References: <87iq821hba.fsf@SSpaeth.de> <m3r5mqgeq8.fsf@x200.gr8dns.org>
	<874ojkf23u.fsf@yoom.home.cworth.org>
Date: Sat, 10 Apr 2010 16:00:49 +0200
Message-ID: <87wrwf9zla.fsf@SSpaeth.de>
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On 2010-04-10, Carl Worth wrote:
> So I propose something like:
> 
>   User-Agent: Notmuch/0.2 (http://notmuchmail.org) Emacs/23.1.1 (gnu/linux)

That looks good to me. So I assume the correct strategy here would be
to:

1) have notmuch reply insert a header:

User-Agent: Notmuch/0.2 (http://notmuchmail.org)

2) have notmuch-reply.el (or whatever) add a setup mail hook that
searches for an existing User-Agent header and appends " Emacs/23.1.1
(gnu/linux)"  

One issue is again, such a hook would be message mode
specific, so gnus users might not appreciate that. Also when composing a
message via c-x m this would not work. So perhaps an all lisp solution?
Again, can we hijack message mode to add our own promotion header?
Or has the time come for a notmuch-message-mode that somehow inherits
from message mode? bremner said something about dynamic bindings that
would allow that.

Sebastian