How do I fix this issue,

  • Thread starter Thread starter Heidi McGrath
  • Start date Start date
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Heidi McGrath

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How do I fix this issue please?Your message couldn't be delivered. The Domain Name System (DNS) reported that the recipient's domain does not exist. Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their domain isn't properly registered at their domain registrar. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem. For more information and tips to fix this issue see this article: Fix NDR error 550 4.4.7 in Exchange Online - Exchange.

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