郵便 ゆうびん差出 さしだし はこじゃなかったです
yūbin sashidashiwa kojanakattadesu

Noun
Desu Copula

The polite, past negative form of 郵便差出箱

1. Wasn't a mailbox.; Wasn't a postbox.

Past/Perfective
Negative
Polite
Casual Register