Why can't the mobile phone suddenly receive the school express message? I can receive the news from my classmates normally, but I can't get the news from the courier center. The mobile phone is an app

Why can't the mobile phone suddenly receive the school express message? I can receive the news from my classmates normally, but I can't get the news from the courier center. The mobile phone is an apple. School express is almost a short message sent by Taobao directly to your mobile phone, including your express information, such as what the express is, the express number and so on. And you won't send a text message alone, but the courier will call you or send a text message if he sends a courier, so it may be related to your unsubscribe from Taobao's text message. Another situation is that mobile phones are automatically classified as spam messages. Personal experience, I hope to help you.