This is the mail system at host relay8-d.mail.gandi.net. 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 : host mail3-smtp-sop.national.inria.fr[192.134.164.98] said: 550 #5.1.0 Address rejected. (in reply to RCPT TO command) [-- Attachment #2: Delivery report --] [-- Type: message/delivery-status, Encoding: 7bit, Size: 0,4K --] Reporting-MTA: dns; relay8-d.mail.gandi.net X-Postfix-Queue-ID: CD46C1BF21E X-Postfix-Sender: rfc822; sentry@softwareheritage.org Arrival-Date: Mon, 18 Jan 2021 12:00:10 +0000 (UTC) Final-Recipient: rfc822; vincent.sellier+sentry@inria.fr Original-Recipient: rfc822;sysop+sentry@softwareheritage.org Action: failed Status: 5.0.0 Remote-MTA: dns; mail3-smtp-sop.national.inria.fr Diagnostic-Code: smtp; 550 #5.1.0 Address rejected. [-- Attachment #3: Undelivered Message Headers --] [-- Type: text/rfc822-headers; charset=us-ascii, Encoding: 7bit, Size: 1,3K --] [-- text/rfc822-headers is unsupported (use 'v' to view this part) --]