Most Internet Service Providers give you email services that use POP3, ie they can be accessed using Outlook Express.

However, there is often the possibility of that one invalid email that keeps stopping your mail downloads, and every time you connect it downloads the same messages, and gets stuck at the same one.

All you need to do is start POPDele, select your ISP, enter your email details and delete the stuck messages. Then, outlook express should work again.