I really like how mail can sort incoming messages by subject. This means that they are grouped together and then I can just open the thread and view the conversation between me and other people involved with the email. My problem with it is that sometimes when the same subject is used for 2 separate sets of correspondances, it will be grouped together. Is there a way so that the computer will track a given communication and only group emails together only when the subjects match and when it is from a person who was in the original email or something to that effect?