I typically export mail regularly. In my case, I store them in a DEVONthink Pro Office database as that supports directly importing from Apple's Mail.app, has good search, and good cross-referencing support.
I really wish I followed this practice sooner as there's mail from the 90s I wish I still had. I've used e-mail continuously since 1991 so it would be a lot of mail. Disk space is the main reason why I didn't do it sooner.
I really wish I followed this practice sooner as there's mail from the 90s I wish I still had. I've used e-mail continuously since 1991 so it would be a lot of mail. Disk space is the main reason why I didn't do it sooner.