If you're encountering a "Failed to Send Email" error in WordPress, it means that the site is having trouble sending emails, such as for password resets, notifications, or contact form submissions. Here are steps to address this issue:

1. Check SMTP Configuration:

   • Verify that your SMTP (Simple Mail Transfer Protocol) settings are correctly configured. You can use a plugin like "WP Mail SMTP" to set up SMTP for your WordPress site.

2. Use a Reliable SMTP Service:

   • Consider using a third-party SMTP service like Gmail, SendGrid, or SMTP.com. They often provide more reliable email delivery.

3. Check Spam Folder:

   • Sometimes, emails may be marked as spam by recipient email providers. Ask users to check their spam folders.

4. Check PHP Mail Functionality:

   • Ensure that your server supports PHP's mail function. Some hosting providers might have restrictions on email sending.

5. Check DNS Settings:

   • Verify that your domain's DNS settings, especially the MX records, are correctly configured. Incorrect settings can lead to email delivery failures.

6. Check Firewall or Security Plugin:

   • If you're using a security plugin or firewall, it might be blocking the email-sending process. Review the settings of any security plugins you have installed.

7. Check Email Provider's Restrictions:

   • If you're using an email service (like Gmail or Outlook) for sending emails, they may have limitations on how many emails you can send in a given period.

8. Check Email Queue:

   • If you're using a plugin that manages email queues (like WP Mail SMTP), check if there are emails stuck in the queue waiting to be sent.

9. Check Email Logs:

   • If your server provides email logs, review them for any error messages related to email sending.

10. Test Email Sending:

    • Use the SMTP plugin or a plugin that allows you to send a test email. This can help diagnose if the issue lies with your email setup.

11. Contact Hosting Provider:

    • If none of the above solutions work, get in touch with your hosting provider's support team. They may be able to provide specific guidance based on their server setup.

Remember to double-check your email settings for accuracy, and always test email functionality after making any changes. Additionally, consider using an email logging plugin to keep track of sent emails for troubleshooting purposes.