The Oracle Messaging Server fails to load the 64 bit SMG-SP client library even though the Oracle Messaging Server configuration specifies the correct path to the libraries. This results in a failure to initialize the spam and antivirus filtering service in the MTA possibly resulting in all messages being deferred with an SMTP 421 temporary failure message.
imsimta -test error indicating incorrect library loader configuration
Usually when this occurs it is the result of the 64 bit library path not being set to include the path to the SMG-SP 64 bit libraries. There is also in SMG-SP 10.5 a hardcoded search path in libbmiclient.so.1 which can result in errors loading the SMG-SP client library if it is not overidden.
The issues loading the 64 bit SMG-SP client library can be addressed by appending two entires to the library loader search path as follows:
SMG-SP 64 bit SDK