How can i find a person using only an email address?
You cannot use an email address to locate someone. There’s not email directory, as there is with landline phones. You would be better off contacting the school and inquiring about him. They can at least tell you where he might be, or contact him to contact you. You could attach a delivery and/or read request to the email to see if someone actually opens it. Not all systems handle read requests (most Exchange servers understand them), but delivery requests are pretty common.
