A mailbox for received mail; a receptacle (often at a home or office) for delivered letters and parcels.
玄関の郵便箱に配達証が入っていたので、郵便局へ受け取りに行った。
There was a delivery notice in the mailbox at the entrance, so I went to the post office to pick it up.
大家は共用の郵便箱を掃除してから新しい住人を迎えた。
The landlord cleaned the communal mailboxes before welcoming the new tenants.
引っ越し先の郵便箱の番号を確認しておいてください。
Please check the mailbox number at your new place in advance.
A postbox for outgoing mail; the public mailbox on streets or in front of post offices where you drop letters.
ポストに葉書を投函するため、近くの赤い郵便箱まで歩いた。
I walked to the nearby red postbox to drop off a postcard.
雨の日は封筒が濡れないように郵便箱に素早く入れた。
On rainy days I quickly placed the envelope into the postbox so it wouldn't get wet.
この郵便箱は回収が午後3時なので、それまでに出さないと翌日になる。
This postbox is collected at 3 p.m., so if you don't send it by then it will go out the next day.