Cloudmark is now part of Proofpoint. Learn More
This means that your LD_LIBRARY_PATH (or other library configuration) is missing the indicated file(s). If you ignore the warning, then Cloudmark filtering will be skipped when a message is scored.
Examine the rest of the warning and look for one or both of the following lines:
libcmaeclient.so.2.0: cannot open shared object file
libstdc++.so.X: cannot open shared object file
To configure the location of these library files, see the INSTALL file.