Puntuado con 2 de 5 estrellas

Hi,
since Eudora doesn't work anymore, I'm trying Thunderbird, so I transferred the emails with "ImportExport Tool". The emails that are transferred from Eudora to Thunderbird are mixed up with the ones I deleted.I'll give you an example: if I get some propaganda email, I delete them as well as the messages that come from the forums that say: there's a response to your post.In fact, the messages transferred are too many, 2500. And only those messages that I had deleted do not have the subject, but only the title. So I have a lot of confusion of messages.In "ImportExport Tool" I used "Import individual mbox files". What does "Import individual mbox files with sbd structure" mean? I hope I have chosen the right option for importing emails.
Maybe I need to configure "ImportExport Tool"?
Thank you.

Esta valoración es de una versión anterior del complemento (14.1.16). 

IETNG only supports standard mbox files. Eudora is not creating standard mbox files.
Please see this thread. Converters are mentioned at the bottom.
This should be a question not a poor review.,
https://github.com/thunderbird/import-export-tools-ng/issues/476
Christopher