windows li ve mail in windows 10

Been using this for years but suddenly there was a fault. I'm unable to send or receive. I've carried out repair and re entered my MS account details. It does appear to have connected to Plusnet but says it needs to download necessary folders, which it appears to be doing however it's been doing so for over 4 hours with no indication of its progress. So I closed it down. I have my list of contacts, my sent folder, my drafts, my deleted files. Only send and receive and inbox are missing.