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“550 domain of forward path is not allowed” error message appears when sending mails in InterScan Messaging Security Suite (IMSS)

    • Updated:
    • 14 Jan 2015
    • Product/Version:
    • InterScan Messaging Security Suite 7.1 Windows
    • InterScan Messaging Security Suite 7.5 Windows
    • Platform:
    • Windows 2003 Enterprise
    • Windows 2003 Standard
    • Windows 2008 Enterprise
    • Windows 2008 Standard
Summary
Your mails are not sent and you encounter a Non-Delivery Report (NDR) with the following error message on IMSS:
550 domain of forward path is not allowed
Details
Public
The issue occurs because the recipient's domain name (example.com) is not in the Relay Domains list. To resolve this:
  1. Go to the IMSS management console and click Administration > IMSS Configuration > SMTP Routing > Message Rule.
  2. Add the domain name (example.com) in the Relay Domains list and click Save.
If the issue still persists, please contact Trend Micro support.
Premium
Internal
Rating:
Category:
Configure; Troubleshoot; Deploy
Solution Id:
1106332
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