Maybe it makes sense to apply your acquired knowledge on Pegasus mailboxes to Mail::Box, so you would be able to make use of all of the nice features of Mail::Box, and the rest of us would be able to use Pegasus mailboxes with Mail::Box as well.

Yes, that's a good idea, I'm sure it would be a good extenstion for Mail::Box, possibly passing the mailbox "type" to indicate the mailbox is of Pegasus format.

Peter