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'SMTP Error: 550 recipient was not found in LDAP server' appears in InterScan Messaging Security Suite (IMSS)

    • Updated:
    • 9 Nov 2015
    • Product/Version:
    • InterScan Messaging Security Suite 7.1 Linux
    • InterScan Messaging Security Suite 7.1 Windows
    • InterScan Messaging Security Suite 7.5 Windows
    • Platform:
    • Linux - Red Hat RHEL 4 32-bit
    • Linux - Red Hat RHEL 5 32-bit
    • Linux - Red Hat RHEL 6 32-bit
    • Linux - SuSE 10
    • Linux - SuSE 9.0
    • Windows 2000 Advanced Server
    • Windows 2000 Server
    • Windows 2003 Enterprise
    • Windows 2003 Enterprise Server
    • Windows 2003 Standard
    • Windows 2003 Standard Server Edition
    • Windows 2008 Enterprise
    • Windows 2008 Standard
Summary

When the Check for Recipient in LDAP server option is enabled and the rcpt to: field contains an alias or secondary address for an Active Directory user, the following error appears:

rcpt to:alias-email@sampledomain.com 550 recipient <alias-email@sampledomain.com> was not found in LDAP server

Details
Public

To resolve the issue, enable IMSS to check for multiple email addresses or aliases of an Active Directory user.

For IMSS 7.1 Linux and IMSS 7.5 Windows:

 
IMSS 7.1 Linux users should download and install Service Pack 1 first before following the procedure.
  1. On the IMSS web console, go to Administration > End-User Quarantine.
  2. Click the User Quarantine Access tab.
  3. Select the Allow end users to retrieve quarantined email messages with alias email addresses option.

For the other IMSS versions:

 
This workaround only works if your LDAP server is Microsoft Windows Active Directory. If you are using other LDAP server such as Domino LDAP, IMSS will reject all the users after applying the procedure below.

Run the following commands on the IMSS Central Controller:

C:\>"osql.exe -U sa -P sa -d imss"
1>"update tb_global_setting set value='proxyAddresses' where name='mail_attr'"
2>"go"
(1 row affected)
1>"quit"

If you are not using the default password for the IMSS database, provide the correct password after "-P".

Premium
Internal
Rating:
Category:
Troubleshoot
Solution Id:
1035754
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