Email, Messaging, & Video Calls Email 162 162 people found this article helpful When to Use 'Reply All' in Email Group Messages Do you really need to reply to everyone in a group message? By Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated February 09, 2020 NickyLloyd / Getty Images Email Yahoo! Mail Gmail Tweet Share Email Use your email program's reply-all feature only when your response is relevant for the original sender and all people in the original email's To and Cc fields. Do not reply-all when: Only the original sender needs to know your reply.Your comments will be crucial to know for the original sender but only a few other recipients. Reply to the sender and then add the select other recipients manually. Copy their addresses from the original email if that helps.Your message is simple acknowledgment like "Thanks!" or "Me too." Reply-all responses should be reserved for special cases only.