can't export some mail files
For the purpose of archiving, I monthly export my IMAP Inbox mail files to a hard drive. This has worked well. But I seem to have a couple of mail folders in my Inbox that simply don't want to export. That is, I select Import/Export Tools->Export folder, and point it to my desktop, and no file appears on my desktop. None at all. They don't get put anywhere. No error messages. Just doesn't do it. This works fine for other mail files in the same Inbox. WTF?
I can export them with "Export all messages in the folder', but that exports them in a form that is unimportable as a folder.
Restarting TB doesn't help.
Alla svar (3)
Can you tell us what those folders are called? Or show us a screenshot?
https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
Well, one folder is called mail.x, which won't export, and others called mail.y and mail.z export properly. These are all in the IMAP Inbox.
Interestingly, if you copy all the e-mails from the IMAP folder to a folder in Local Folders, that latter folder exports just fine. That's a pretty inconvenient way to have to do routine exporting, though.
Also interestingly, the behavior has now changed. Those folders that before wouldn't export at all, now export into a file that contains nothing. Weird.
Should I suspect that this has something to do with IMAP, in that sometimes what is in those IMAP folders are just pointers, and not real e-mail content?