J'ai un probleme pour envoyer un mail au collègue johnwalz@ameritech.net a partir de mail.lipn.univ-paris13.fr

J'ai pas de problème en utilisant Gmail ou univ-grenoble-alpes.fr

Que se passe t'il au LIPN ?

Merci

CC

-------- Message transféré --------

Sujet :	Undelivered Mail Returned to Sender
Date :	Wed, 5 Oct 2022 16:40:01 +0200 (CEST)
De :	Mail Delivery System <MAILER-DAEMON@lipn.univ-paris13.fr>
Pour :	christophe.cerin@lipn.univ-paris13.fr

This is the mail system at host mail.lipn.univ-paris13.fr.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<johnwalz@ameritech.net>: host al-ip4-mx-vip1.prodigy.net[144.160.235.143]
said: 553 5.3.0 alph761 DNSBL:ATTRBL 521< 194.254.163.15 >_is_blocked.For
assistance forward this error to abuse_rbl@abuse-att.net (in reply to MAIL
FROM command)