[MlMt] Migrating from Postbox

[Vincent Acheson]

I have over 17gb of imap data spread across 3 accounts, held locally on
two different Macs, one running Postbox 3, the other Postbox 4 (don't
bother!).

Given Postbox's Thunderbird roots and data structures, is there a way to
get MailMate to import the mbox files from Postbox?

 Thanks!
Vincent