I'm missing entire or partial Gmail folders!

Note: if you are missing folders and your provider is not Gmail, please see this article instead.

If you’re missing certain Gmail folders or labels once your email import is complete, there may be some settings within your Gmail account that need to be tweaked beforehand:

1) Make sure IMAP is enabled.
2) Make sure all of your folders are visible in IMAP.
3) Make sure there are no folder size limits set.

After those settings are adjusted, start a second email import. None of the emails that were imported the first time will be duplicated -- only the new ones will be transferred.