Chambers wrote:
> Unfortunately, Thunderbird is showing this message as a reply to a
> thread from 2000.
> 
> Does someone know how to make it thread replies by message ID, and not
> by topic name?
> 
> ...Chambers

Okay, this is only safe if you like editing the user.js file. There are
two seperate issues with how T-bird threads. One is that it puts
everything with Re: <title> as a reply to the earliest thread named
<title>. The other is that it ignores references. So, add the following
to your 'user.js' file. Normal path to that file is C:\Documents and
Settings\<username>\Application Data\Thunderbird\Profiles\<random
letters and numbers>.default\user.js on windows.


# Stop threading messages together if they simply have the same subject
# (none of the messages start with "Re:")
user_pref("mail.thread_without_re", false);
# Only thread by reference headers, ignore subject
user_pref("mail.strict_threading", true);

Got that info from a thunderbird wiki that I forgot to bookmark, so I
can't quote the source and google isn't being helpful in tracking it down.

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