one of my sub mailboxes somehow got inside another mailbox. I need to get it back out. How do I do that?

I have the same problem, but I have no idea in which folder it is buried, so short of going through them all one by one..? If I could only find how to see the directory of all folders.

There's another answer to a similar question that says to look in the User Library, but unhelpfully, doesn't tell how to find that and it doesn't come up when you search.

The folder is there as a Spotlight search reveals the emails inside it, but I can't find the folder - I mean mailbox - itself. Can anybody help?

maybe 50. In the end I opened them manually one by one until I found the mailbox I’d misplaced.

If spent so long looking for an intelligent solution I’d run out of time so just had to crack on with it.

If still like to know how to find a mailbox inside a mailbox though

Click on the inner one, hold & drag out to the list where you want it.

Any luck yet?

How many Folders/Boxes do you have?

OK, good luck Hazel. :)