I presume you are using xp home sp2 with outlook express.
Open OE .. goto tools..accounts...mail... post back what is there or try this
Once you get to the mail as above,double click pop wanadoo or orange or freeserve.
Then click servers
Incoming mail should read pop3
The next box should read
Incoming mail (pop3) pop.wanadoo.co.uk
Outgoing mail (smtp) smtp.wanadoo.co.uk
You may have to change Wanadoo to freeserve or orange.
Make sure the account name (your email address) is correct and the password is correct also.
Hope this helps