1. Open Outlook by selecting it's icon along the dock

    Outlook for Mac 2011 (Dock)
  2. Go to the Tools menu, then click Accounts

    Outlook for Mac 2011 (Tools Menu)
  3. Select the "+" dropdown menu from the lower left and select "E-mail..."

    Outlook for Mac 2011 (Add E-Mail)
  4. Enter the following account information 

    Email address: The full e-mail address you want to set up
    Password: The password you set when you created the email account.
    Username: Your full e-mail address

    Type: IMAP
    Incoming Server: mail.webinabox.net.au
    Select 'Use SSL to connect' in the 'incoming server' section
    Outgoing Server: mail.webinabox.net.au
    Select 'Use SSL to connect' in the 'outgoing server' section
    Select 'Override default port' and change '25' to '587'

    Check with the image below to ensure your settings look similar

    Outlook for Mac 2011 (Settings)
  5. You're done! Double Check all of your settings are correct as per the image below, then click Add Account in the bottom left.