Linux Tbird 140.7.1esr (64bit) running under Ubuntu 22.04, and with imap on all my email accounts. I normally manage emails locally in Tbird, hardly ever go to webmail. In my list of Local Folders, there are two which show up with the name 'Outbox' and identical icons. Viewing each folder's Properties, the name Outbox is unsurprisingly given for both, but their locations are different: mailbox://nobody@Local Folders/Unsent Messages mailbox://nobody@Local Folders/Outbox 1. Are these two folders supposed to have the same purpose? One (or both) must be for the [in my case extremely rare] situation where I compose an email but its actual sending is frustrated (eg router turned off). 2. I cannot rename either folder, eg by attempting to edit the Name field when viewing the properties box. If their function is distinct, being able to change the name to reflect this would be nice. 3. If the purpose is the same, presumably only one is actually used by Tbird. Which one? Can I delete the other, and if so how - just in case Tbird would automatically recreate it? Not a big deal - this has been the situation for a long time (brain fog stops me remembering just how long) - but this is untidy and it niggles.