I’m going to jot down little tidbits I find while using Leopard, things that are good and things that are not so good.
I like the revised Mail.app (though judgement still reserved on the TODO’s and Notes features). One thing I have noticed is that you can now do Gmail style searches in the main search bar.
Keywords that I’ve found work so far:
from:
to:
subject:
Haven’t worked out how to do date based searches yet, and folder: or mailbox: don’t seem to work yet, but I’ll post more if I find something.
UPDATE
I found some more in the spotlight searching help file
date: eg date: yesterday or date:24/08/07
kind: eg kind: document or kind:movie (this find messages with an attachment of a particular type)