Notice on Email (SMTP) Function
1. Please note users' email SMTP server must be turn on.
2. When enter email or sending email via PC, it should not need to input verification code.
3. It allows less-secure sign-in method.
4. Please take the recipient emails to white list
5. please note the SMTP server limit on attachment size, some of them can not allow attachment over 10M
6. if attachment size is 1.5M, when sending out, it may take 2M