How do I set up email in CashManager so that I can send files from CashManager itself? 

There are a couple of ways of setting up email within CashManager.

Click on Setup>Options. Select the Email option on the bottom of the screen.
A. Enter your email address in the first blank field e.g. This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
B. Choose MAPI Client as the preferred method if you use Microsoft Outlook / Outlook to send and receive email. By doing this you will able to keep a copy of the emails in the sent items file in Outlook.
C. Choose the other method if you do not use Microsoft Outlook or Outlook and then enter the user name, password and the SMTP mail server and the tick the option if it needs the notification.  These details can be gathered from your internet service provider or the email service provider’s website.