<form method="POST">
    <h3>Editing: SentMessage.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Mailer;

use Symfony\Component\Mime\Message;
use Symfony\Component\Mime\RawMessage;

/**
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 */
class SentMessage
{
    private RawMessage $original;
    private RawMessage $raw;
    private Envelope $envelope;
    private string $messageId;
    private string $debug = '';

    /**
     * @internal
     */
    public function __construct(RawMessage $message, Envelope $envelope)
    {
        $message-&gt;ensureValidity();

        $this-&gt;original = $message;
        $this-&gt;envelope = $envelope;

        if ($message instanceof Message) {
            $message = clone $message;
            $headers = $message-&gt;getHeaders();
            if (!$headers-&gt;has('Message-ID')) {
                $headers-&gt;addIdHeader('Message-ID', $message-&gt;generateMessageId());
            }
            $this-&gt;messageId = $headers-&gt;get('Message-ID')-&gt;getId();
            $this-&gt;raw = new RawMessage($message-&gt;toIterable());
        } else {
            $this-&gt;raw = $message;
        }
    }

    public function getMessage(): RawMessage
    {
        return $this-&gt;raw;
    }

    public function getOriginalMessage(): RawMessage
    {
        return $this-&gt;original;
    }

    public function getEnvelope(): Envelope
    {
        return $this-&gt;envelope;
    }

    public function setMessageId(string $id): void
    {
        $this-&gt;messageId = $id;
    }

    public function getMessageId(): string
    {
        return $this-&gt;messageId;
    }

    public function getDebug(): string
    {
        return $this-&gt;debug;
    }

    public function appendDebug(string $debug): void
    {
        $this-&gt;debug .= $debug;
    }

    public function toString(): string
    {
        return $this-&gt;raw-&gt;toString();
    }

    public function toIterable(): iterable
    {
        return $this-&gt;raw-&gt;toIterable();
    }
}
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