A favour please: if you find any of these particulary useful - or useless - please let me know!
http://www.wikihow.com/Add-an-Email-Account-to-Older-Versions-of-Microsoft-Outlook
http://www.youtube.com/watch?v=vFWp-3YIBOc
... but DON'T do the sending part of this.
http://office.microsoft.com/en-us/outlook/HA012316341033.aspx
http://quintagroup.com/services/support/tutorials/email-account/outlook
http://www.youtube.com/watch?v=Od88HVfz4t8&feature=related
http://wiki.answers.com/Q/How_do_you_add_an_email_account_to_Gmail
http://quintagroup.com/services/support/tutorials/email-account/thunderbird/
When adding a new email account (for receiving email), your email client may ask you about outgoing email settings. It's important that you use the same outgoing setting as for your personal email.
Do not attempt to enter the details of your BRAINBOX website/mailserver.