I am not sure who those emails belong to. Are they supposed to be for companies that claim they are successfully recovering stolen/lost coins, or are those people who have used such services "successfully"? Anyone can create a Gmail and yahoo account. That doesn't mean their stories are fake, but it also doesn't mean they are true. Shilling and providing fake feedback is done to trick more people into believing that it's a legit business. But anyone can write how they used Company X, how trustworthy they are, cheap, and professional. Don't trust anything you see online, especially when it's about crypto or the recovery of funds, keys, seeds, etc.