To be fair that's not the same at all. This one looks like the message boxes that appear during gameplay, while the submission is only about the letters you can send/receive in the game.

They complement each other nicely though.

Thank you for sharing that! I had originally started this project with the intention of making an editor for the "mail" from Pokémon G/S/C before I decided to focus on Animal Crossing instead. It's cool to know that I'm not the only one interested in that sort of thing, but shame that they never added the mail from that game.