Not long ago, a mysterious Christmas card dropped through our mail slot.

不久前，一张神秘的圣诞卡片从我们的信箱里掉了出来。

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My mail slot has a lot of intra-office and inter-office letters and memos.

我的信箱里有很多办公室内的和办公室之间的信件和备忘录。

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I go to the mailroom to check my mail slot to see what mail has arrived overnight.

我去收发室查看我的邮件槽看看邮件是否已连夜到达。

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Vince stands in the tiny foyer of his tiny house, if you can call a coatrack and a mail slot a foyer.

NPR: Excerpt: 'Citizen Vince'

They have allowed Boston to slide in through the mail slot.

WSJ: Boston Celtics, New York Knicks: Boston Can't Shock New York Again��Right?