Content of an electronic message can be presented to a recipient of the electronic messaging. At least one visible user gesture made by the recipient while reviewing the content can be identified using an image capture device. Based on the visible user gesture(s), at least one sentiment of the recipient while reviewing the content can be determined. At least one response indicator can be selected to represent the sentiment(s) of the recipient while reviewing the content. The response indicator can include a predefined graphic. The response indicator(s) can be communicated to a sender of the electronic message. The response indicator(s) can indicate to the sender the sentiment(s) of the recipient while reviewing the content.