The below steps will show you how to bulk email specific clients. 

• Go to your Client, Prospect, List.
• Optionally, filter your list to target specific clients.
• Click the "Email All" button at the top right.
• You can Select 'Show Filtered Email list' to further toggle Clients on or off manually.
• Once you have your group of clients you draft the email.
• Click send—emails will be queued and you’ll get a notification when done.