HELP open mails with outlook 2007???

Not possible, unfortunately. Suomi24.fi service doesn't work with separate e-mail programmes (in technical terms: it doesn't offer POP or IMAP services).
You just have to use the www interface.

If you have another address that works with MS Outlook, you may use a workaround. Set option in suomi24.fi service to resend messages to that other address, now you can read messages with your e-mail programme without having to sign up for the suomi24.fi service. You can't send messages this way through suomi24.fi service, however.

Or use another service that supports POP service (like gmail.com).