在PHPMailer中显示为纯文本正文

require 'PHPMailer/PHPMailer.php';

$mail = new PHPMailer\PHPMailer\PHPMailer();

$mail->isSMTP();
$mail->Host = 'smtp.example.com';
$mail->SMTPAuth = true;
$mail->Username = 'your-email@example.com';
$mail->Password = 'your-password';
$mail->SMTPSecure = 'tls';
$mail->Port = 587;

$mail->setFrom('your-email@example.com', 'Your Name');
$mail->addAddress('recipient@example.com', 'Recipient Name');

$mail->Subject = 'Example Email';
$mail->Body = 'This is the plain text body of the email.';
$mail->isHTML(false); // Disable HTML mode

if ($mail->send()) {
    echo 'Email sent successfully.';
} else {
    echo 'Error sending email: ' . $mail->ErrorInfo;
}