Reading e-mail is done by clicking on the e-mail's "Subject", which brings up the screen shown below. Click on the icon to reply to the sender, click on the to reply to the sender plus all other recipients, i.e. "Reply to All", or click on icon to forward your message to somebody else. Use the and arrow icons to navigate to the previous or next e-mail message respectively.
When you are finished, you can click on the icon to return to your previous folder, or the icon to log off.
If you have an attachment you will see a list at the bottom of your e-mail. Simply click on the "Download" link and choose a directory to save the file.