How can I verify if an email was successfully sent after using the mail() function in PHP?

After using the mail() function in PHP to send an email, you can verify if the email was successfully sent by checking the return value of the mail() function. If the return value is true, then the email was successfully accepted for delivery by the mail server. However, this does not guarantee that the email will be delivered to the recipient's inbox, as there could be issues with the recipient's email server or spam filters. 

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

if (mail($to, $subject, $message, $headers)) {
    echo 'Email sent successfully.';
} else {
    echo 'Email could not be sent.';
}

Keywords

email verification mail() function PHP error handling SMTP server

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