failure to download from my email

I just downloaded Thunderbird on my new Mac, asked it to synch with my email and it's done it very imperfectly, missing lots of folders and sub-folders, showing deleted a… (ვრცლად)

I just downloaded Thunderbird on my new Mac, asked it to synch with my email and it's done it very imperfectly, missing lots of folders and sub-folders, showing deleted and archived folders (in italics) and so on. It did this on a previous desktop too, where I uninstalled Thunderbird and reinstalled it to try - but failed - to solve the issue. What did I, or it, do wrong and how do I correct it? Thanks / Maurice

კითხვის დამსმელია mherson 6 დღის წინ