You can group the list of email addresses into a single entity.
  • Click on “Contacts” link,
  • Click on “+icon” (New Group) and give a name to the New group.
  • Now you can add new contact to this group or you can move the existing contact to this group.
When you want to send mails to a group, in the To field of the compose box, type the few letters of group name, auto-complete feature will suggest list of group names that matched your word. You can choose from the list and sending mail to the groups.