Unable to transfer an entire local folder to Inbox

Question

To transfer a local folder to an inbox I usually can simply drag the folder from the 'Local Folders' section up to '[email protected]' and it will begin copying the emails to the server. However every time it hits email 377 it errors out saying that the email cannot be parsed. I need some information as to how to identify which email is 377 as there are many conversations/emails back and forth in the folder. There seems to be no way to transfer the folder any other way that I know of. Is there a way to fix/properly parse this email other than deleting it?
It's also worth noting we do not manage the mail server and have no way to drop the local folder there on the server side.

Answer 1

I don't like dragging folders in Thunderbird. I don't know what's supposed to happen. I don't see any formal descriptions of how/if this functionality is implemented.
If it's using IMAP then it would be most unusual for Thunderbird to be unable to create a folder on the server.
Try this: go to your Inbox, right-click and select "New Folder" or "New Subfolder" as appropriate. Then open your folder in Local Folders, select the required messages, use right-click and "Move to" and select the required folder in the account.
Do you have no access to the mail account via webmail, i.e. via your browser?