Why is my WordPress email form not working with PHP mail()?

The PHP mail() function requires specific configuration. Follow these steps:

• Email Requirement: Use an operational email address created in your account for the "TO" or "FROM" header.
• Create Email: Set up an email via Email > Mailboxes (https://us.cloudlogin.co/mail/).
• Update WordPress: Configure your WordPress form to use the new email address.
• Use SMTP Plugin: Install https://wordpress.org/plugins/wp-mail-smtp/ with settings:
  • Mail From: [your domain email]
  • Outgoing SMTP Server: mail.supremecluster.com
  • SMTP Authentication: Yes
  • Username: [your domain email]
  • Password: [your password]
  • Secure Connection: SSL
  • SSL SMTP Port: 465
• Alternative: Use PHPMailer (https://github.com/PHPMailer/PHPMailer).