Bonjour, en envoyant un mail à l'adresse erwan.lanneau@univ-grenoble-alpes.fr qui redirige vers une boite gmail, j'obtiens ce mail d'erreur. D'après "dig TXT lipn.univ-paris13.fr", il semble que SPF soit mis en place par le labo, mais gmail la confronte avec une IM de l'université de Grenoble-Alpes (152.77.200.56) et donc se plaint. Existe-t-il une parade ? Bonne soirée, Thierry -------- Message transféré -------- Sujet : Undelivered Mail Returned to Sender Date : Mon, 11 Dec 2023 22:42:27 +0100 (CET) De : Mail Delivery System <MAILER-DAEMON@zm-mta-out-3.u-ga.fr> Pour : thierry.monteil@lipn.univ-paris13.fr This is the mail system at host zm-mta-out-3.u-ga.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 <erwan.lanneau@gmail.com>: host gmail-smtp-in.l.google.com[108.177.15.27] said: 550-5.7.26 This mail has been blocked because the sender is unauthenticated. 550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM. 550-5.7.26 550-5.7.26 Authentication results: 550-5.7.26 DKIM = did not pass 550-5.7.26 SPF [lipn.univ-paris13.fr] with ip: [152.77.200.56] = did not pass 550-5.7.26 550-5.7.26 For instructions on setting up authentication, go to 550 5.7.26 https://support.google.com/mail/answer/81126#authentication i16-20020a5d6310000000b0033338ece805si4441525wru.122 - gsmtp (in reply to end of DATA command)