All that's under there is clamscanner:
infinity:/ zimbra$ cd /opt/zimbra/lib/ext
infinity:~/lib/ext zimbra$ ls -lR
total 0
drwxr-xr-x 3 root wheel 102 Jan 15 23:28 clamscanner
./clamscanner:
total 16
-rw-r--r-- 1 root wheel 5722 Jan 15 23:28 clamscanner.jar
infinity:~/lib/ext zimbra$ |