
For example if you have two POP accounts and they're set to account4,account3, Thunderbird only knows about two accounts. Type in the edit field in the Config editor and see how many account ids it lists. If they are still missing something probably deleted its account from the list of known accounts in the setting. If your local folders are missing after upgrading Thunderbird (and you didn't deliberately get rid of them) set the advanced folder view to All Folders using View -> Folders -> All.

If you enable auto-save of drafts, it's less likely to interfere with your typing if you store them in Local Folders. You could use offline folders instead, but that can cause complications and you would need to switch Thunderbird to working offline to access those folders. Local Folders provides a convenient place to store messages locally when desired. Conversely, if you use an IMAP e-mail account, mail is stored "remotely" (on the server) rather than being downloaded and stored "locally" (on your own computer).If you reconfigure several profiles to use a common directory for Local Folders outside of the profile, it's much easier for those users to share mail messages.You can use Local Folders as a place to archive old messages, so that the actively used mail folders are smaller and less cluttered.Sent newsgroups messages are saved in Local Folders by default.

That folder is also used to send a message in the background if you set ndInBackground true. When you compose a message and save it to be sent later ("File -> Send Later"), it is saved in the Unsent Messages folder in Local Folders.


If you configure a POP account to use a Global Inbox, the new messages are downloaded into a Inbox folder in Local Folders, and the POP accounts folders are hidden in the folder pane.
