Review for ImportExportTools by DaveSlap
Rated 4 out of 5 stars
Pros;
-Works great, saves hours of work.
-Easy to understand.
-Many options.
Cons;
Will not import messages from a single mbox file (forwarded from an account, to the same account.) e.g. account01@mail.org sent to account01@mail.org
To create your own collections, you must have a Mozilla Add-ons account.