Hello, One of my customer, hosted at Google workspace, have recurrent problem when sending to some addresses at live.fr or 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 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 2026-05-06T05:21:48.296Z 08DEAAD6427386FD] [ DU2PR04CA0024.eurprd04.prod.outlook.com 2026-05-06T05:21:48.305Z 08DEAAEBE699717D] [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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