Is there any way that I can check my new mail, who it's from eg, without actually opening it? Everytime I click on "Inbox", after receiving a notification of new mail, it automanically opens.
If you download the FREE program called Mailwasher and install it you can even read incoming mail while it's still at the ISP web site. Then you can either accept it or delete it as required. Used it for about 10 years now with OE, Win98 and now XP.
(N.B. This is not an advert, just a helpful suggestion).
In Outlook Express ...
Switch off viewing (preview pane)
On incoming mail ...
Right-Click on the email/Properties/Details/Message source
It's ALL there.