Re: [Evolution] remove duplicate emails

[Lee Revell <rlrevell joe-job com>]

On Sat, 2005-12-10 at 21:30 +0100, guenther wrote:
> > > Note that there is an ambiguity in how you define duplicate messages.
> > > Multiple downloading from pop server results in true duplicates, but the
> > > "reply to all" generally does not (the headers will have minor
> > > differences). 
> >
> > Thanks for that.  I didn't tell you that I use IMAP and the duplicates
> > have to deleted over there.  But indeed, there is a copy of the mails,
> > because I use evolution often in offline mode (on my notebook), and have
> > all my emails here.  Do you think the script will work there too?
> >
> > Do you think the two emails 'reply to all' have different Message-ID's?
>
> No. "The headers will have minor differences" does not refer to the
> Message-Id, but to the Received headers at a minimum.
>
>
> > I think every email has an Message-ID.  Why not just delete duplicates
> > by Message-ID?  I think also to mailing lists, the message id is the
> > same.
>
> Yes, they will be the same when Replying to All. Anyway, Message-Id's
> are not *guaranteed* to be unique. Although, granted, identical
> Message-Id's for different mails are very rare. Yes, we had this
> discussion pretty often in the past...

Because we don't WANT a mailing list message that's also cc'ed directly
to the recipients to be considered a duplicate mail.  This is the
desired behavior on most linux development mailing lists like LKML where
most recipients procmail the list mail into a separate folder, so you
get messages CC'ed to you directly in your inbox, but the list folder
preserves the threading.

Personally I think we should just copy Mutt's implementation, I've never
had it do the wrong thing.

Lee