I got Send/Receive error: 0x800CCC13 on one IMAP mailbox when doing a Send & Receive on a fresh Windows 10 installation. The full error text is:
Error message: ‘Robert – Sending’ reported error (0x800CCC13): ‘Cannot connect to the network. Verify your network connection or modem’
Which is a little odd, when other IMAP mailboxes are working OK as part of the same Send & Receive.
The solution is a system file scan & repair; from the command prompt run
sfc /scannow
Which just takes a few minutes to complete and resolves the problem.