使用启用了 Microsoft 反垃圾邮件的 MailKit 获取已读回执

Answer 1

我终于找到了如何阅读原始消息。

而不是将零件加载为MimeMessage，我只需将其加载为MultipartReport...

foreach (MimeEntity part in message.BodyParts)
                {
                    Console.WriteLine($"A part of type {part.ContentType.MimeType} is found");

                    if (part.ContentType.MimeType == "message/rfc822")
                    {
                        Console.WriteLine("This is a message, we load it");
                        using MemoryStream ms = new();
                        part.WriteTo(ms, true);
                        ms.Seek(0, SeekOrigin.Begin);
                        report = MimeEntity.Load(ms) as MultipartReport;
                        Console.WriteLine(report?.ToString());
                    }
                }

Answer 2

无需将内容写入流，只是为了再次重新解析它。

您需要做的就是：

foreach (MimeEntity part in message.BodyParts)
{
    Console.WriteLine($"A part of type {part.ContentType.MimeType} is found");

    // MessageParts are message/rfc822 (or equivalent such as message/news
    // or message/global which is the UTF-8 version of message/rfc822)
    //
    // Never use case-sensitive string comparisons like
    // part.ContentType.MimeType == "message/rfc822" because MIME does not
    // restrict things to lowercase. Instead, the recommended way of checking
    // for an exact mime-type is part.ContentType.IsMimeType("message", "rfc822")
    // or
    // part.ContentType.MimeType.Equals("message/rfc822", StringComparison.OrdinalIgnoreCase).
    if (part is MessagePart rfc822)
    {
        Console.WriteLine("This is a message, lets see if the body is a multipart/report");
        if (rfc822.Body is MultipartReport report)
        {
            // handle the multipart/report which is already in a parsed state
        }
    }
}