Can you access your mail via webmail, i.e. via web browser? That would be a way to check mail at home - or anywhere, for that matter - and still leave it on the server so that you could download to Outlook at the office.
Alternatively, just set your email client (Outlook Express, Outlook, Windows Mail, etc.) at home to leave messages on the server. That way, downloading messages at home will not delete them from the mail server and you'll still be able to retrieve your mail at the office.
