by the reference to "News Account" because you aren't sending email via a news account.
In Outlook Express you can check your mail account settings very easily:-
1. Click on 'Tools' and select 'Accounts'
2. Make sure that the 'Mail' tab is selected
3. Look for your default mail account and click once on the words to highlight them.
4. Now click the properties button on the right, and on the General section you should see your name and email address. If the address isn't there, enter it.