Changing your email on PS4 without the password can be a tricky situation, but it is possible with the right steps. Here's how you can go about it:

1. Contact PlayStation Support: If you can't remember your password and need to change your email, reaching out to PlayStation Support is your best bet. They can guide you through the process and help you update your email efficiently.
2. Verify your identity: PlayStation Support will likely ask you to verify your identity to ensure that you are the account owner. Be prepared to provide any necessary information or documentation to confirm your identity.
3. Update your email: Once your identity is verified, you can proceed with changing your email. Follow the instructions provided by PlayStation Support to update your email successfully.
4. Set up two-factor authentication: To prevent future issues with accessing your account or changing your email, consider setting up two-factor authentication. This adds an extra layer of security to your account.

By following these steps and reaching out to PlayStation Support, you can change your email on PS4 even without knowing your password. Remember to keep your account information secure to avoid any similar issues in the future.