Ok, tell me if this is a totally awful idea, but it seems quite useful
to me, even if unusual...
Is it practical to implement a mountable filesystem for mail archiving
whose contents are served by a MySQL (or other SQL) database?
Creating this is surely way beyond my level of expertise in FreeBSD,
and maybe even the full design is, but I imagine this much:
The actual supporting database would include category strings for each
message (many-to-many). File names in the filesystem would be
category strings, so saving an email would file it in that category
(to save in ...