From the Search Results screen:
From the Full Display screen (any tab):
From your organization's list of lists:
From the contents of a list, you can e-mail an entire list:
From the contents of a list, you can e-mail just one or more lists:
How do you complete an e-mail message?
After you've initiated an e-mail from one of the screens above, you'll arrive at this form:
You'll receive a confirmation screen that your e-mail has successfully been sent.