[Kenan]

Overall gist: http://i.eho.st/pp22pqgf.png

When you view an email, only text is shown. You can "View as HTML", but images are blocked. http://i.eho.st/pp2fukzy.png

Personally, this renders the web interface useless to me, so I view my email through Outlook.

[Avshalom]

Looks like SquirrelMail, Aurelius is probably right.

http://squirrelmail.org/

Makes sense, it's sort of the goto open source webmail app.