1. Open the browser, visit the email address 163.com, enter the account number and password, click Login, and successfully enter the email interface.

2. In the email interface, click "Write" or "Create a new email" to enter the new email editing page.

3. Add Recipient: Enter the e-mail address of the recipient in the Recipient or Recipient field. If you want to send it to more than one person, you can use a semicolon (; ) or comma (,) to separate each email address.

4. Fill in the subject of the email in the "Subject" or "Subject" field to describe the content of the email concisely and clearly.

5. In the email body area, you can enter the text you want to give to the recipient, which can be greetings, explanations or other information that needs to be expressed.

6. Click the "Attachment" icon (usually a paper clip icon) in the editor, select the file to send or drag it to the specified location. After confirming that the attachment is uploaded, wait for the attachment to be displayed.

7. Preview and send: At the bottom of the editing page, you can preview all the contents of the email to ensure that the attachments and contents meet the requirements. When finished, click the "Send" button to send an email.