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+---- Thread: Why I get this error Validation (/showthread.php?tid=396)
Why I get this error Validation - wssupport - 12-29-2025
![[Image: mailersend.png]](https://forum.whmcsservices.net/cn/mailersend.png)
That's because your whole WHMCS system does not use the same Domain name that you registered with MailerSend