Hi.
I have 10s to 100+ mailboxes hierarchically organized. I have close to 600mb and 90,000 messages in mail. I would love for Celeste to be able to handle that.
Fidonet had nice stuff to hold tons of mail efficiently, especially the Squish and Jam mail storage designs. I believe that I have the standards somewhere, they seem pretty straightforward to implement. Among other things, Squish supports mail file compaction on the fly while storing new mails.
Andres.