Using Bcc and Reply All

 Bcc

Bcc - The Bcc option allows you to send an email to a group of people without sharing their email addresses or names with everyone.
 
Use Bcc when sending an email to all your parents so that you don't violate their privacy by sharing their email address with others.
 
Reply All
 

Reply All - The button should be used very carefully. This reply option should only be used if everyone who received the email along with you needs to read your reply.