Please following below procedures kindly.
1. Please verify registered email account and ensure it is correct.
2. Please check spam folder in email system to search the email.
3. Whitelist Binance email in your email server, please refer to: https://support.binance.com/hc/en-us/articles/360000444531
Please add below accounts into your whitelist:
4. Ensure that email client works normally.
5. It is recommended to use Gmail, Outlook and QQ email service.