The best method is to use your filters to send emails in bulk. 

  1. In the left navigation, click Leads & Contacts > Contacts
  2. At the top of the screen, click the Filter button.
  3. Update your filter then click the X to go back to your contact list view. 
    • Your contacts will update dynamically when changing your filters.
  4. Next to the Actions column, check the box that highlights all of your contacts. 
  5. At the top of the screen, click Actions > Send an Email.
  6. Next to the email template you want to send, click Actions > Send.  
  7. (Optional) Edit the email content and message settings (if applicable).
  8. Click Send Message

PRO TIP: It's always good practice to preview your email before you send it.