i just moved all my mailboxes first from one server to the new one by using rsync. After that i created the folders using Thunderbird to have same folder structure like on old server.
Then i copied all mail files into the folders.
Now when i subscribe and click on the folder in Thunderbird it starts downloading the headers of all mails, but after finishing download nothing appears in the mail list. Its like my folder is empty and everytime i click again on the folder thunderbird starts again downloading headers.
What is wrong here?
I found a solution using a tool called imapsync, but its not for free, so i started doing it by copy&paste. I thought Thunderbird will be able to fix the indexes. :-(
Or is there a better solution to migrate from dovecot maildir to courier maildir?