How can server settings impact the functionality of the mail() function in PHP?

Server settings such as SMTP configuration, mail server restrictions, and firewall rules can impact the functionality of the mail() function in PHP. To ensure proper functionality, make sure that the server settings allow outgoing emails and that the PHP configuration is correctly set up to send emails. 

// Example PHP code snippet to set up SMTP configuration for sending emails
ini_set('SMTP', 'mail.example.com');
ini_set('smtp_port', 25);

$to = 'recipient@example.com';
$subject = 'Test Email';
$message = 'This is a test email sent using SMTP configuration.';
$headers = 'From: sender@example.com';

mail($to, $subject, $message, $headers);

Keywords

server settings mail() functionality PHP impact

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