Email is setup using "Tools -> Path and Email Setup" from the Main Menu
Setup the email to send directly.
(Using the default mail client causes each email to launch the default Email Program which would mean dozens of Outlook or Thunderbird clients to start at the same time)
The required values are:
PDF Printer - This must be "KLMWriter" or PDF Stubs will not be generated.
Email Address to send From
These values will be provided by your Internet provider or your IT staff.