Yes there is no need to download any mail client in case of windows vista as you can do the same using windows mail comes by default with a windows vista.
So, no thunderbird required in this case if you have windows vista installed.I have configured my gmail account in windows mail. As per the interface quite a sleek and fast interface with looks similar to thunderbird.
Donâ€™t forget to configure the setting of your account in order to start receiving mails i have listed all the steps required to configure a gmail account for the rest of other pop3 or imap 4 account i suggest google it.
1. Entering the email id.
2.Specifying the server address.
3. Specifying the gmail account settings.
Enjoy Windows Mailâ€¦