Sending a private Classmates Email is easy. To send a Classmates Email, simply visit another member's profile and click the Send Email option. If you're using a mobile device, click Say Hi to the right of the member’s profile photo.
If you are viewing a member’s full profile, click the envelope icon to the right of member’s profile photo to send a private message.
Your friend will receive an email notification that a new message is waiting in their Classmates Inbox (unless they've opted out of email notifications). While most people respond quickly to a Classmates Email, keep in mind that your friend might not check his or her email often, so there could be some delay.