What are common reasons for PHP mail function not working on a Red Hat Linux server?

Common reasons for the PHP mail function not working on a Red Hat Linux server include misconfigured mail server settings, firewall restrictions blocking outgoing mail, or PHP not being properly configured to send mail. To solve this issue, you should check the mail server settings, ensure that the firewall allows outgoing mail connections, and configure PHP to use a valid mail server. 

// Example PHP code snippet to configure PHP mail function on Red Hat Linux server
ini_set('SMTP', 'mail.example.com');
ini_set('smtp_port', 25);
ini_set('sendmail_from', 'your_email@example.com');

$to = 'recipient@example.com';
$subject = 'Test Email';
$message = 'This is a test email from PHP mail function';
$headers = 'From: your_email@example.com';

// Send email
$mail_sent = mail($to, $subject, $message, $headers);

if ($mail_sent) {
    echo 'Email sent successfully';
} else {
    echo 'Failed to send email';
}

Keywords

PHP mail function Red Hat Linux server troubleshooting

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