Thanks Brian. Just gor it solved. A very old document came to the rescue.
http://www.symantec.com/business/support/index?page=content&id=HOWTO16465&profileURL=https%3A%2F%2Fsymaccount-profile.symantec.com%2FSSO%2Findex.jsp%3FssoID%3D1385985166361W80LU69t3LqADAB8gLUlAP9fk12igywD2y2fl
Below mentioned regex solved it,
.*\.[pdxzrjma][dolpiv][fcstprgei34]\.[evbc][xbao][estm]
I was missing a dot in the begining of the expression. Anyways.. Thansk a lot for your response.