What are common reasons for PHP mail() function not working properly?

Common reasons for the PHP mail() function not working properly include incorrect mail server settings, firewall restrictions blocking outgoing mail, and missing required parameters in the mail() function call. To solve this issue, double-check the mail server settings, ensure there are no firewall restrictions blocking outgoing mail, and make sure all required parameters such as recipient, subject, and message are included in the mail() function call. 

// Example code snippet with correct mail() function parameters
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";
$headers = "From: sender@example.com";

// Send email using mail() function
$mailSent = mail($to, $subject, $message, $headers);

if($mailSent) {
    echo "Email sent successfully.";
} else {
    echo "Failed to send email.";
}

Keywords

PHP mail function SMTP spam folder email headers error messages

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