A mailbox is an object found within the streets. When the Silly Meter is past phase one of its progression status, mailboxes spring to life and offer Toons a power-up in damage for Throw gags when interacting in a Cog battle nearby. Mailboxes look different on every playground.
- An orange mailbox much like the ones from Toontown Central appears next to the Toon Headquarters in the Toontorial whenever Doctor Surlee is there waiting for his package during the Twelve Days of Winter. For some reason, Surlee always says to never trust mailboxes.
- Some artworks created by staff members of Toontown Rewritten showcase a mailbox with wings, such as the one above.