Men in the post office classify mail according to places it is to go.

邮局里的人员将信件按寄送地点分类。

《新英汉大辞典》

True faith drops its letter in the post office box, and lets it go.

真信心把信件投在邮箱里以后就让它去了。

youdao

(Terry meets Benjamin in the post office.) Terry: Hi! Ben! Nice meeting you here!

本杰明在邮局下面碰到了泰瑞。

youdao

He planned to re-pay party supporters with jobs in the post office department.

VOA: special.2010.05.27

This ten percent included half the officials in the Post Office Department.

VOA: special.2010.04.29

Also,new cases of dishonesty had been discovered in the Post Office department.

VOA: special.2010.04.29

He said Miss Thomas's last name appears in the post office records but her first name is not recorded.

BBC: Rare Truro blue marked letter found in Exeter archive

And, in Japan, they keep their savings unproductively in the post office.

ECONOMIST: Social conventions and demography add to the sclerosis

What began as corruption in the post office, burgeoned into a secret fundraising scheme that included payoffs to members of Congress in return for their vote.

NPR: Corruption Claims Cloud Brazil's Presidential Election