We are a medium sized business working on apple macs. We each have our own email account, but need the ability to file emails (both incoming and outgoing) in project folders. So each user has the ability to see and read emails sent by colleagues on shared projects in the office. Do you know if there are add-ons for Thunderbird that could allow this?
It would be similar to the mailmanager add-on for MS Outlook, currently only available for windows only.