If you use IMAP or Windows Live Hotmail accounts in Windows Mail or Outlook Express, these applications can automatically synchronize folders when you go online and download all messages for offline use.
Change email sync settings on a Windows computer
In many cases this is useful behavior, but Windows Mail and Outlook Express can also only download headers and not the entire message, and they cannot automatically synchronize at all.
This setting can be adjusted on a per-folder basis, so that, for example, your Inbox is fully synchronized, while Windows Mail or Outlook Express only retrieves the headers of new messages in certain shared IMAP folders.
To change the synchronization settings for a folder in Windows Mail or Outlook Express:
