It is actually an outdated-fashioned term and native speakers of English do not use it. It really is used in neither British English nor American English. It is sweet to stay away from ‘highly regarded’ in salutations. I could not discover any other authoritative assistance on Indian English greetings online, https://netwebdirectory.com/listings13270950/how-much-you-need-to-expect-you-ll-pay-for-a-good-buy-craft-beer-online-in-atlanta-ga