What are some common pitfalls when using PHP mailer for SMTP authentication?

One common pitfall when using PHP mailer for SMTP authentication is not properly setting the authentication credentials, such as the username and password. This can result in authentication errors and failed email sending. To solve this issue, make sure to provide the correct SMTP server, username, and password in the mailer settings. 

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

// Instantiation and passing `true` enables exceptions
$mail = new PHPMailer(true);

try {
    //Server settings
    $mail->isSMTP();
    $mail->Host = 'smtp.example.com';
    $mail->SMTPAuth = true;
    $mail->Username = 'your_smtp_username';
    $mail->Password = 'your_smtp_password';
    $mail->SMTPSecure = 'tls';
    $mail->Port = 587;

    //Recipients
    $mail->setFrom('from@example.com', 'Your Name');
    $mail->addAddress('recipient@example.com', 'Recipient Name');

    //Content
    $mail->isHTML(true);
    $mail->Subject = 'Subject';
    $mail->Body = 'Email body';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
}

Keywords

PHP mailer SMTP authentication authentication failure email delivery error handling

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