In apple mailbox If try to add a new mailbox the new mailbox temporarily appears for a few seconds and then disappears
Tried rebuild without success
allanfromcambridge wrote:
Tried rebuild without success
Add a new Mailbox where...
Favorites?
On My Mac?
What are you rebuilding if it "temporarily appears for a few seconds and then disappears" ?
Add email accounts in Mail on Mac
Create or delete mailboxes in Mail on Mac - Apple Support