You can access your email online from anywhere at any time. You can also set up your email to be used with an email client. This is an email program or application on your computer or device, like Apple Mail, Outlook or Windows Mail.
If you already access email from an email client, you shouldn’t need to enter your details again after the transfer - simply refresh the relevant email application after the transfer and access your email as normal. If this does not work follow the relevant instructions here.