Raghuveer,
First and foremost, thanks for the information and assistance with this.
1) When generating an autosupport via the Web UI I receive this error.

2) When generating an autosupport from the maintenance console using the "Post to NetApp" option I receive this error.

3) Using the maintenance console and sending the autosupport via email seems to work ok. Is there a default email address to send to NetApp?
4) Periodic AutoSupport is enabled but not being received by NetApp.