In
See where it says Tools on the Command Bar?
Click on the Tools menu and select Toolbars -> Customize from
the Menu.
Note: You can also right click on the Command Bar and select
Customize Command Bar -> Add or Remove Commands from that menu.
In the Customize Toolbar dialog, click on "Read Mail" in the
left hand column.
Hit the Add button to move it into the right hand column.
You can use the Move Up and Move Down buttons to move the icon
to the left or right.
You should now see an envelope icon displayed on your Command
Bar which will launch your default email program.
For more info take a look at this article.
The Mail button is not in the toolbar in Internet Explorer 7http://support.microsoft.com/kb/926325
Good luck
Nepatsfan