About Mysterious Mail

Mysterious Mail creates personalised mystery games sent by post that make you feel like a genuine detective, uncovering puzzles, codes, and hidden stories.

Mysterious Mail was originally created to entertain the author’s own children and friends, but soon grew into a unique way to send mystery gifts by post. Each game combines puzzling documents, secret codes, and hidden stories that spark curiosity and imagination. Today, families, adults, and children around the world enjoy receiving our personalised mysteries through the letterbox.

Mysterious Mail is part of Outfox the Box Ltd, a UK company that began by designing and running escape room experiences for corporate clients, as well as building puzzle-based attractions for businesses and museums. The anonymous creator behind our games prefers to stay in the shadows, but has also worked in screenwriting and radio plays, bringing storytelling and suspense to every mystery. With every envelope, the goal remains the same: to create screen-free adventures that inspire wonder, teamwork, and discovery.