Voici le texte du message "undelivered mail returned to sender" :
This is the mail system at host smtp2-g21.free.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
<xxxxxxxxxxx@gmail.com>: host gmail-smtp-in.l.google.com[64.233.184.26]
said: 550-5.7.1 [212.27.42.2 12] Gmail has detected that this message
is likely 550-5.7.1 unsolicited mail. To reduce the amount of spam sent to
Gmail, this 550-5.7.1 message has been blocked. For more information, go to
550 5.7.1 https://support.google.com/mail/?p=Unso ... ssageError
ffacd0b85a97d-43d1e52aefbsi13618414f8f.349 - gsmtp (in reply to end of DATA
command)
Reporting-MTA: dns; smtp2-g21.free.fr
X-Postfix-Queue-ID: 4B6342003E3
X-Postfix-Sender: rfc822; xxxxxxxxxxx@free.fr
Arrival-Date: Fri, 3 Apr 2026 22:43:03 +0200 (CEST)
Final-Recipient: rfc822; xxxxxxxxxxxxx@gmail.com
Original-Recipient: rfc822;xxxxxxxxxxxxx@gmail.com
Action: failed
Status: 5.7.1
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [212.27.42.2 12] Gmail has detected that
this message is likely 550-5.7.1 unsolicited mail. To reduce the amount of
spam sent to Gmail, this 550-5.7.1 message has been blocked. For more
information, go to 550 5.7.1
https://support.google.com/mail/?p=Unso ... ssageError
ffacd0b85a97d-43d1e52aefbsi13618414f8f.349 - gsmtp
