You can send it by logging in to your email address.
If you use Windows 10 computers of Huawei, ASUS and other brands to send QQ emails, NetEase emails, etc., you must first open the browser, enter QQ email or NetEase email, click search, enter the official website and select login, and the login is successful. Then click to write a letter, then select the recipient, fill in the subject and text according to the page prompts, and then select the file to send.
For other mailboxes, the way to publish emails is relatively similar. The main thing is to log in to the mailbox and then choose to send the email. Of course, the most important thing is to know the other party's email address.
Many mailboxes require a mobile phone number to register, but for QQ mailboxes, you can log in directly with your QQ number, and the mailbox account is also associated with the QQ number.