This is the mail system at host quigon.rez-gif.supelec.fr. #################################################################### # THIS IS A WARNING ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. # #################################################################### Your message could not be delivered for more than 4 hour(s). It will be retried until it is 60 day(s) old. 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 &lt;root(a)quigon.rez-gif.supelec.fr&gt; (expanded from <root>): host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=18654-04-4 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.036 s): id=18654-04-4 (in reply to end of DATA command)