You may not receive a response to your Classmates Email for various reasons. Your friends may not check their email often, may be on vacation, or may choose not to reply. You can check your inbox regularly to find out if your messages have been read or replied to.
To view the status of your sent messages, click the Sent tab at the top of your Classmates Inbox, which you can locate by clicking your name/picture in the orange bar at the top of any page. Message status (read, unread, or replied) is shown to the right of each message you've sent.
For Mobile Users: To view the status of a sent message using a mobile device, make sure your browser is set to Desktop site. For information on how to set your device to Desktop site.