Residents of Sesame Street used the shop to send and receive letters and packages, and the shop also offered fax, copying, and packaging services, as advertised on the neon sign in the window. Grover occasionally did delivery work for the shop.
The shop was located next door to Hooper's Store, in the spot formerly occupied by Maria and Luis' Fix-It Shop. However, in Season 37 (Episode 4109), the Fix-It Shop returned and the Mail It Shop was gone, indicating that toaster repair may be more profitable than mailing services.
- "Mail It Shop" appears as a property on the Monopoly: Sesame Street Edition game board, in place of Virginia Avenue.
- In an interview, Steve Whitmire explained that there are "two real internet connected Macs in the Fix-It Shop". At the time the article was written, it would have been the "Mail It Shop".