To use the email reply feature, open the email message you want to respond to and click on the “reply” button or icon. This will open a new email message with the original message quoted or included in the body of the email. You can then type in your response or changes to the original message and hit “send” when you are ready to send your response back to the original sender. The technical description of this process involves the action of hitting the “reply” button triggering a command within the email program to open a new email message window containing certain pre-populated fields such as the recipient, subject line, and quoted message. When the user types a response and clicks “send,” the email program will send the message back to the original sender through the Simple Mail Transfer Protocol (SMTP) which transmits the message through the internet to the appropriate email server and then ultimately to the recipient’s inbox.