To configure PHP Mail settings, you need to edit the php.ini file. This file contains the configuration settings for PHP on your server. The primary settings you need to adjust include:
SMTP: The SMTP server address. smtp_port: The port number for the SMTP server, usually 25, 465, or 587. sendmail_path: The path to the sendmail program, if you're using it. mail.add_x_header: Adds an X-PHP-Originating-Script header to track the origin of the email.