I have also received a scam email from
noreply.admin@lipn.univ-paris13.fr today. Even if the mail server marks it as spam, I think it would be better to reject these emails by the mail server because no unauthenticated person should be able to send an email in front of
lipn.univ-paris13.fr (not only this verified domain but also all other domains)
It may cause a real issue in future.
PS. Gmail automatically rejects emails not sent from the valid mail server using the SPF record. Checking DKIM can improve it.