How did the mail newspaper get the letter from duchess

I think there may be some confusion here!

The Mail newspaper did not receive a letter from a Duchess. The Mail is a British national newspaper that publishes news, articles, and features, but it did not receive a letter from a member of the royal family or a duchess.

If you're referring to a specific article or story, could you please provide more context or details? I'd be happy to help clarify or provide more information.