How can PHP handle undeliverable emails sent using the mail() function?

When using the mail() function in PHP to send emails, there is no built-in way to handle undeliverable emails. One way to address this issue is to set up a return path for bounced emails to a specific email address that can handle processing them. This way, you can monitor bounced emails and take appropriate actions, such as updating the recipient's email address or unsubscribing them from your mailing list. 

// Set the return path for bounced emails
ini_set('sendmail_from', 'bounced@example.com');

// Send email using mail() function
$to = 'recipient@example.com';
$subject = 'Test Email';
$message = 'This is a test email';
$headers = 'From: sender@example.com';

// Check if email was sent successfully
if (mail($to, $subject, $message, $headers)) {
    echo 'Email sent successfully';
} else {
    echo 'Failed to send email';
}

Keywords

PHP mail() undeliverable emails error handling bounce emails

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