I'm in the process of migrating from Thunderbird to Evolution, and have been able to import most of my Thunderbird email folders, but several of the larger archival folders are only partially imported. I get the message:

"Cannot append message to maildir folder: /home/zerubbabel/.local/share/evolution/mail/local/.Local Folders.Temp/tmp/1415478764.18440_6156.dz: No content available."

These few offending folders are completely accessible within Thunderbird, but can't be fully imported into Evolution. I wonder if there is another mechanism whereby I could export them from Thunderbird and import them into Evolution. I tried exporting them as .eml files, but Evolution doesn't import that format.

I also tried using the mb2md script, which theoretically can convert from mbox to maildir format, which is what Evolution uses, but I can't figure out how to get it to work.

Can anyone help?