Authentication mail usually arrives in 5 minutes.
1. Verify that your email address is correct. E-mail will not be sent normally if the e-mail you entered contains a typo.
2. If you haven't received the authentication e-mail, please check your spam mailbox.
Sometimes e-mail goes to your spam folder. Please release spam designation and try to authenticate it.
3. It is difficult to send mail if your mailbox is full, or if e-mail account is dormant because you haven't used it for a long time.