You can reply to just the sender or to all recipients of a message.
1. Open the message. If the message is part of a conversation, open the conversation and select the message you want to reply to.
2. At the bottom of the message, click Reply (to reply to just the sender) or Reply to all (to reply to all recipients).
3. Optionally, add other email addresses to which to send the reply.
4. Enter your reply in the message field.
5. At the top or bottom of the message, click Send.