MongoD able to start w/ any valid form certificate w/o validate it against the CA

MongoD 3.0 GA

Environment:

1) Single Mongod
2) Certificates from an external CA authority (windows 2008), certificates attached

• newcert4.pem - Certificate and private key
• CA4.pem - CA auth certificate

Problem:
Start mongod with netcert4.pem works correctly (see command line), but I expected it to work only with --sslCAFile (AS this is not a self-sign certificate)

%MongoD%\mongod --replSet EitanRs3a --port 5002 --dbpath d:\data\db1 --storageEngine wiredTiger -
-logpath d:\data\rs3primary.txt --sslMode requireSSL --sslPEMKeyFile newcert4.pem