IMAP not sychronising, Windows mail error 0x800CCC0F

IMAP not sychronising, Windows mail error 0x800CCC0F

Since yesterday I am unable to sync my IMAP inbox using Windows Live mail.
I am getting this error message:

Unable to send or receive messages for the *** IMAP account. Header download for the 'Postvak IN' folder did not complete. Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity.

Server Response: Your IMAP command could not be sent to the server, due to non-network errors. This could, for example, indicate a lack of memory on your system.
Server: 'imap.zoho.com'
Windows Live Mail Error ID: 0x800CCC0F
Protocol: IMAP
Port: 993
Secure(SSL): Yes

Please help!!
regards,
Dave