If you can't receive the mail, please try the following:
1. Make sure the mail address you filled in when you registered is correct.
2. Check your spam folder or other folders.
3. Add our mail address to mail whitelist. Here take Gmail as an example: https://support.google.com/a/answer/60751
4. Check if the mail client you use is working properly.
5. Better to choose popular mail servide provider like Gmail, Outlook, QQMail.