|Are these existing emails in another program (outlook express, thunderbird, etc), or are they still residing in a webmail account. |
Outlook can import from outlook express, but not thunderbird I believe it is File>Import). For a webmail account, you just set up an 'account' in outlook for that mail address, and it will download whenever you log onto it.
You have to be a little bit crazy to keep you from going insane.
If all else fails, read instructions.