How to send something to someone else's mailbox?

1. Login email, enter user name and password, and click Login;

2. Click "Write Letter" (select in the red box below);

3. Enter the other party's email address in "To" (the red box below);

4. Enter the information you want to send to the other party in the red box below;

5. Click "Send" (selected in the red box below);

6. Display "Sending Successfully".