How can PHP beginners ensure that their web server is configured to allow the mail() function to send emails successfully?

To ensure that the mail() function can send emails successfully, PHP beginners should make sure that their web server is configured with an SMTP server and that the necessary settings are properly configured in the php.ini file. They should also check for any restrictions or firewall settings that may be blocking the sending of emails.

// Example PHP code to send an email using the mail() function
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";
$headers = "From: sender@example.com";

// Send email
if (mail($to, $subject, $message, $headers)) {
    echo "Email sent successfully.";
} else {
    echo "Email sending failed.";
}