Was heißt »Postkasten« auf Englisch?

Das Substantiv Postkasten lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Der Postbote leert den Postkasten.: The postie is emptying the postbox.; The postman is emptying the postbox.; The postman empties the postbox.
Wenn ich den Brief geschrieben habe, werfe ich ihn in den Postkasten.: When I've written the letter, I'll put it in the postbox.
Ich sah mich nach einem Postkasten um.: I looked around for a mailbox.

I've got to check my letter box.
I need to check my letter box.
I have to check my letter box.
"Have you looked in the letter box?" "Yes, and it's completely empty."
"Have you looked in the letter box?" "Yep, and it's a yawning chasm."
The postie was here a minute ago. Go and see if anything's come through the letter box.
The postie's just been. Go and see if there's anything in the letter box.
There's no post in the letter box.
Is there a postbox near here?
Tom checked his letter box.
Where's the postbox?
Do you know where might I find a letter box?
"Mary, there was a letter for you in the letter box. From Tom. Here it is." "I don't want to read it. Throw it away please, John."
There's a postbox somewhere down this street.
I can't open my letter box.
I checked my letter box.
Were there any letters in the letter box?
Drop it in a postbox.
Put it in a postbox.
"How do I get to the cinema?" "Go right at the postbox and then carry on till the next side street."