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Non-delivery report (NDR) error message when users send mail to Office 365 users: "Relay Access Denied"

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When an external sender tries to send an email message to a Microsoft Office 365 user, the external user receives a non-delivery report (NDR) that resembles the following:
<Domain_URL> #5.7.1 smtp;554 5.7.1 <clientemailaddress>: Relay access denied

When an Office 365 user tries to send an email message, the Office 365 user may receive an NDR that resembles the following:
<Domain_URL> #<<Domain_URL>#5.4.6 smtp;554 5.4.6 Hop count exceeded - possible mail loop> #SMTP#

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This issue may occur if all the following conditions are true:
  • The domain exists as a disabled domain in Microsoft Forefront Online Protection for Exchange (FOPE) under the Microsoft Business Productivity Online Standard Suite account.
  • The domain was added and verified in Office 365.

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Contact FOPE Support to resolve this issue.

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Keywords: KB2495882, o365, vkbportal237, vkbportal225, vkbportal231

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Article Info
Article ID : 2495882
Revision : 15
Created on : 8/31/2012
Published on : 8/31/2012
Exists online : False
Views : 65