Hi David,
To properly identify the problem, you need to analyze the SMTP headers
of a successfully delivered email (to a different destination, for example).
Feel free to contact me privately if you need help.
Jonathan
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On 5/6/26 08:57, Hello Maildrop via mailop wrote:
Hello,
One of my customer, hosted at Google workspace, have recurrent problem
when sending to some addresses at live.fr <http://live.fr> or
hotmail.com <http://hotmail.com>
The messages bounce back indicating a DKIM failure, however the
messages sended are well signed. Delivery to other destinations
enforcing DKIM/DMARC does not cause any problems (Gmail, Orange)
550 5.7.515 Access denied, sending domain MISSEGLE.COM
<http://MISSEGLE.COM> doesn't meet the required authentication level.
The sender's domain in the 5322.From address doesn't meet the
authentication requirements defined for the sender. To learn how to
fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303 Spf=
Pass , Dkim= Fail , DMARC= Pass
[AM8P189MB1234.EURP189.PROD.OUTLOOK.COM
<http://AM8P189MB1234.EURP189.PROD.OUTLOOK.COM>
2026-05-06T05:21:48.296Z 08DEAAD6427386FD]
[DU2PR04CA0024.eurprd04.prod.outlook.com
<http://DU2PR04CA0024.eurprd04.prod.outlook.com>
2026-05-06T05:21:48.305Z 08DEAAEBE699717D]
[DB1PEPF000509FE.eurprd03.prod.outlook.com
<http://DB1PEPF000509FE.eurprd03.prod.outlook.com>
2026-05-06T05:21:48.308Z 08DEA716CB8BDD0A]
I can't identify the cause of this problem, do you have any ideas?
*TOUREL David*
*MAILDROP*
17 ch de la Longuié - 81210 MONTFA
Tél : 05 63 51 07 79
Retrouvez-nous sur Twitter @maildrop_fr <https://twitter.com/maildrop_fr>
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