Unfortunately threading by reference and threading by conversation is not
available in Entourage. That is what allows you to have threads with
multiple levels, so that you can see which message in a thread is in reply
to which. It's an often requested feature. Your request here should be
recorded. Alternatively, you can send feedback using the web form. In
Entourage X or 2004, go to Help > Send Feedback on Entourage. Otherwise,
click on this direct link to enter Mac Product Feedback:
<
http://register.microsoft.com/mswish/suggestion.asp>
In the meantime, I use a custom arrangement to group threads for mailing
lists and newsgroups. It's not ideal because messages with subject changes
aren't grouped and threading does not indent to show which messages are
replies to which. Here's the custom arrangement I use:
I've set up a custom arrangement (View > Arrange By > Edit Custom
Arrangements). It looks like this:
Group items by: Subject
Sort groups by: Sent Oldest on Top
Sort items within groups by: Sent Oldest on Top
Default display for groups: Expanded
I can then order any folder or newsgroup that way by opening it and then
going to View > Arrange By > My Custom Arrangement (right below the Edit
Custom Arrangements item). It sounds like you definitely want items grouped
by subject. Explore the options to see what works best for you, save it,
and then apply it to a folder.