From: matz@... (Yukihiro Matsumoto)
Date: 2001-05-12T10:22:32+09:00
Subject: [ruby-talk:15028] Re: Why is the subject prefixed with an ID?

Hi,

In message "[ruby-talk:15021] Why is the subject prefixed with an ID?"
    on 01/05/12, "Mattias Wahlberg" <mattias.wahlberg@cyberdude.com> writes:

|How come you prefix all e-mails with a unique ID in the subject line? It's
|heard to get the threading to work in Outlook then. Or does anybody have any
|suggestion?

How about switching mail user agent?
Just a suggestion....