Send same content email only once.
Send same content email only once.


Former-commit-id: 1b9f033ab943aa51d69c82faf3901994b59148a6
Former-commit-id: 2f5a26bc8a0d25bdbbc44199707c6378cd827f06
dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-minion