

If I can get this to work, I'll still have too much mail on my IMAP server.

To decrease how much mail was stored locally, I tried going to the 'Synchronization and Storage' section and setting the 'Disk Space' settings to 'Synchronize the most recent ' on the assumption that that would delete a significant chunk of the past five years' worth of email from my local machine (leaving it on the IMAP server), but that didn't seem to change the size of the local mail file (still at 20 GB), so my first question is whether I have to manually delete older messages on my local machine and, if so, if having this setting checked will prevent TB from re-downloading these messages. Ideally, I'd like to move most of my current mailbox to an archive stored off my primary laptop (but accessible when I need to dig out an old email), but I can't figure out the best way to do that. I would also like to recover most of that disk space since I've got a limited size SSD drive. My nominal work account quota is 5 GB, so I'm annoying my system guy and would like to make him happy by moving most of my mail off his server. I'm using IMAP with message synchronization so that I have access to my files offline, but over time my mailbox has grown too large - getting close to 20 GB. I'm trying to understand the best way to set up my email to deal with my mail provider's quota limits and my desire to keep the total size of the emails on my laptop within reasonable bounds.
