1. Open the email client of the computer or mobile phone and log in to the email account.
2. Click the "Write Mail" button in the "Inbox" or "Write Mail" option.
3. In the email editing page, fill in the address of the recipient. The mailbox of rookie logistics customer service is usually "service@caiexpress.com".
4. Fill in the subject of the email in the "Subject" column and briefly describe the questions or feedback you need to consult.
5. Describe in detail the questions or feedback you need to consult in the article, and attach relevant screenshots or videos.
6. After confirmation, click the "Send" button and wait for the reply from the rookie customer service.