Nowadays, an indispensible function for any email client is to be able to be minimized and hidden in the background, and only appear when you receive a new message. Outlook Express doesn+t have this option by default, but you can by adding this small program: OETray.OETray minimizes Outlook Express to the system tray and lets you work with it in the background. The program requires no installation, and doesn+t consume system resources. Small, effective and completely free.