Does anyone know of a windows 7 email program that has the capability (within a folder) to first group (thread) e-mails by subject line. BUT also where you can take a group of e-mails from one thread and drop it on another allowing for the subject lines to become the same as the thread that you drop it into? Any guidance would be appreciated...... or can an add on or plug in be written to add to an existing e-mail client like Mozilla Thunderbird