Delivery Status Notification (Failure)

Address not found Your message wasn't delivered to m.djeram@univ-biskra.dz because the address couldn't be found, or is unable to receive mail. LEARN MORE

The response was: 550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. Learn more at https://support.google.com/mail/?p=NoSuchUser o21sor1306681qki.134 - gsmtp