Internet Domain Name Services (iDNS) Domain Scam?

All too often we get emails or phone calls from concerned web clients asking about the iDNS or Internet Domain Name Services letter they received in the mail. Is it a scam? Do we need to send money to this company so we can keep our web domain and web address?
HPMG Client Dutch Country Living Lands Spot on Inc. Magazine’s List of Fastest-Growing Private Companies – the Inc. 5000

Hill Productions & Media Group, Inc. is proud to announce that long time client, Iowa-based Dutch Country Living, has landed on Inc. magazine’s 37th annual Inc. 5000 list, the most prestigious ranking of the nation’s fastest-growing private companies.