Sending a Mailshot or bulk email to an entire Hot List or selected Candidates from a Hot List is done from inside the Hot List record.
Click Hot Lists and then click the Name of the Hot Lists you'd like to access.
Click next to the Candidate name to put a check, or click the circle at the top to select all Candidates you wish to Email. Click @Email > To Candidate
The Email editor will then open in a pop-up window. Create the email using this tool. Your organization may have prefabricated templates for you. Clicking the Insert button will show you what's available, otherwise configure your message as you would any email. Click Live Preview to see what it will look like and click Send Email when you are ready.