As you mention Outlook Express, I presume you are using XP. You say that OE does not work right(?) It would seem that the email account has not been configured correctly.

If you don't use Outlook Express which mail client do you use?

Or do you use Webmail?

When you try to send pictures do you mean you are rightclicking on the picture and choosing 'Send to' -> 'mail recipient' If not then how are you doing it?

I guess that you normally use webmail as you state that you do not use Outlook Express. However OE is obviously your default email client as when you rt click on the picture it tries to open OE but as OE hasn't got your e-mail account configured it cannot be sent hence the e-mail errors. Sending pictures via webmail does not work by the right click method you have to open your webmail and then attach the picture by uploading it.