Cat Mail Co. offers players the chance to manage a cozy post office exclusively for feline clientele, though its gameplay design overlooks the potential for uncovering customer secrets. As with many cozy games, players step into the role of a new postmaster inheriting a business from a predecessor who apparently neglected its upkeep. The post office storage room is initially in disarray, with packages piled haphazardly.
Gameplay involves interacting with cat customers who arrive to drop off or pick up mail. When a cat is collecting a package, they provide descriptive clues, such as its height or any distinctive markings, and the addressee's name, requiring the player to locate the correct item from storage. For outgoing mail, players must stamp packages with the correct destination, weigh them, and affix the appropriate postage. An X-ray machine can be used to identify if a package requires special handling stickers, like fragile or heavy.
At the close of each shift, players load outgoing parcels onto a departing boat, guided by the captain's destination. While the organizational tasks of sorting, weighing, and stamping mail are presented as charming, the game largely avoids opportunities for players to learn about the cats' lives beyond their postal needs. The text notes a desire for more narrative flavor, such as customers hinting at the contents of their packages or their motivations for sending them, which would enrich the experience of managing their mail.
Despite the lack of direct snooping mechanics, players can still engage with the game's premise by creating their own narratives for the cat characters. The core gameplay loop focuses on efficient mail processing, appealing to those who enjoy procedural tasks and a tidy environment, but leaves the potential for deeper character exploration largely untapped.