What is the name of the thing that comes after the dog in the mail? - briefly
The name of the thing that comes after the dog in the mail is typically referred to as "the cat."
What is the name of the thing that comes after the dog in the mail? - in detail
The term you're referring to is "cat." In the sequence often used in mnemonic devices or games, the order goes: letter, envelope, stamp, postcard, letter, note, card, package, parcel, box, catalogue, newspaper, magazine, pamphlet, paper, envelope, stamp, postcard, letter, note, card, and then finally, dog. After the dog comes the cat. This sequence is a playful way to remember various items related to mail in an ordered fashion.