From Homestar Runner Wiki
The Mailbox is where Strong Bad checks his "snail mail" on Tuesdays. On one side it reads "sb_snailmail.exe". The mailbox seems to be nowhere near the House of the Brothers Strong. However, the mailbox is seen in front of the house in Strong Bad's Cool Game for Attractive People.
Strong Bad put it up for sale in his garage sale for $111, a reference to other days, the one hundred eleventh email, in which the mailbox debuted. In Compy Catalog, the mailbox was crushed under a giant bag of pennies.
- Debut: Email other days
- Email garage sale
- Homestar Ruiner
- Strong Badia the Free
- Baddest of the Bands
- 8-Bit is Enough
- Compy Catalog
 Other Mailboxes
- A different mailbox was seen in Where My Hat Is At? and its animated remake. Apparently, this mailbox belongs to Homestar, and his hat wasn't in it.
- Yet another mailbox was seen in Teen Girl Squad Issue 5. It belongs to What's Her Face and was used to receive a postcard from the other girls, saying they were on Spring Break. It subsequently grew teeth and chomped the postcard after it was revealed to have birds on the other side.
- A large, public-style mailbox is seen on the Email Menu page.
- There is a mailbox in front of Marzipan's House.