Lord, do hope I'm doing this correctly...am a very senior self taught computer user and not sure what is or isn't considered "personal" information at times.  Will use **** for places that might be such and hope I leave enough for someone to help.  Have a number of folders I keep certain emails in and get the following message for each one!!  Really need and will so appreciate whoever can help me?? 

Unable to send or receive messages for the (******) account. Header download for the '****' folder did not complete. Could not update cached message flags with IMAP server.