OBIEE 11g : nQSError 75027 Failed to open connection to SMTP Server

We have faced an issue when we created an agent and trying to see if its running properly.It runs fine and suddenly displays a message saying

                                   Eventually succeeded, but encountered and resolved errors...

                                   Number of skipped deliveries: 1 of 2

                                    AgentID: /users/weblogic/AgentExample

        [nQSError: 75027] Failed to open connection to SMTP Server (host stbeehive.oracle.com;                                    port 465).                                  

                                   ...Trying SMTP Delivery loop again... Sleeping for 8 seconds


 This message keeps coming no matter what we do, we have checked the SMTP details and they are fine.at last we found a solution.This comes only in case of Mozilla Firefox (at-least for us). Follow the steps and you will be good.

Step 1 :  Mozilla Firefox --> Options --> Advanced Tab -->  Certificates --> View Certificates.

Now find the below three in the list and export them into a folder.

                                    VeriSignClass3InternationalServerCA-G3.crt

                                    VeriSignClass3PublicPrimaryCertificationAuthority-G5.crt

VerisignClass3PublicPrimaryCertificationAuthority.crt

Step 2: Now login to EM --> Business Intelligence--> Coreapplication--> Deployment --> Mail

Under the SSL section make changes as below.I have given my case below.

Connection Security -- SSL/TLS

Specify CA certificate source -- File CA Certificate path --> D:/Mozilla_Certificates

Save and restart the services. and now you should see the agent running perfectly