2 sentences for 送信 (sòng​xìn)

1. 邮递员正在挨家挨户送信。

   yóu​dì​yuán zhèng​zài āi​jiā'āi​hù sòng​xìn.

   The mailman is delivering mail door-to-door.

   Source: Dong Chinese Dictionary

2. 军情火急，我们需要立刻派人送信。

   jūn​qíng huǒ jí, wǒ​men xū​yào lì​kè pài rén sòng​xìn.

   The military situation is urgent; we need to send a message immediately.

   Source: Dong Chinese Dictionary