This is the major reason that I haven't switched to evolution yet.

When I view my IMAP mail on netscape, I delete messages to get them out of
my inbox.  They move to the Trash folder, which is basically my Outbox.  (I
don't have an Outbox folder, and if I wanted one I didn't see how to create
one in evolution last time I checked).

Because evolution's Trash folder is actually a virtual folder, this means that
    a) my "Outbox" (the Trash folder) is invisible from evolution
    b) when I delete messages in evolution (to remove them from my inbox),
they don't go to the Trash folder
    c) which basically means that I can't use both evolution and Netscape
on the same IMAP mailbox.
One of the reasons I use IMAP is that I can use it with different clients.

OK, so how should this be solved?  Not entirely by telling me and other
people that we have stupid mail reading habits, and should not use the
trash folder to store messages, I hope.  I admit that there is a conceptual
difference between deleting things (which you may eventually want to
expunge) and putting them in some kind of Outbox - although both things
effectively get clutter out of your Inbox.  For me, I want to permenantly
delete junk mail, but archive all of the stuff that I get from people that
I know.

So, how can evolution solve this problem?  Here are some suggestions:

1. Invent a user-configurable button, or some kind of shortcut, for 'move
to outbox' in addition to 'move to trash'.  Deleting things is quick, and
the UI makes it easy, but moving things to other folders is too cumbersome
for me to want to use evolution if I have to do that.

2. At least change the name of the virtual trash folder to 'vTrash', so
that I can at least SEE the trash folder!  Also make the action that is
taken when a message is deleted user-configurable.

3. I could (theoretically) mark messages that I need to respond to
important, and then never delete anything except junk mail.  When I want to
get rid of the clutter, I could show only messages that have been tagged as
important.  However, I probably won't do this because
   i) it assumes messages are unimportant until marked important
  ii) filtering on important messages doesn't show me what has come it
recently because it has no concept of time.