使用mimekit/mailkit库获取电子邮件的传递状态 [英] get the delivery status of email with mimekit/mailkit library

问题描述

我正在使用@jstedfast Mimekit/Mailkit库，用于从我的应用程序发送大量电子邮件.我想知道如何获取每封电子邮件的传递状态.这是我的第一次尝试，经过一定的RnD后，我必须在某些地方设置或传递report-type = delivery-status，但我不知道在哪里阅读该文件，该怎么做..我也尝试通过覆盖DeliveryStatusNotification，但一无所获.可能是我朝错误的方向获取通知/状态.

I am using @jstedfast Mimekit/Mailkit library, For sending mass email from my app. I want to know how to get the delivery status of each email. This is my first try to get this and after some RnD i got that we have to set or pass report-type=delivery-status some where, but i didn't get any idea where to do that form the doc where i read this. i also try by overriding DeliveryStatusNotification,but got nothing.May be i am going in wrong direction to get the notification/status.

 protected override DeliveryStatusNotification? GetDeliveryStatusNotifications(MimeMessage message, MailboxAddress mailbox)
    {}

我知道@jstedfast在这里是活动的.为此，我需要您的帮助.我没有任何指示来执行此操作.预先感谢.

I came to know that @jstedfast is active here. I need your help for this. I didn't get any directions to do this. Thanks in advance.

推荐答案

您需要做的第一件事是将SmtpClient子类化，就像文档中的示例一样:

The first thing you need to do is subclass SmtpClient like the example in the docs:

http://www.mimekit.net/docs/html/M_MailKit_Net_Smtp_SmtpClient_GetDeliveryStatusNotifications.htm

public class DSNSmtpClient : SmtpClient
{
    public DSNSmtpClient ()
    {
    }

    /// <summary>
    /// Get the envelope identifier to be used with delivery status notifications.
    /// </summary>
    /// <remarks>
    /// <para>The envelope identifier, if non-empty, is useful in determining which message
    /// a delivery status notification was issued for.</para>
    /// <para>The envelope identifier should be unique and may be up to 100 characters in
    /// length, but must consist only of printable ASCII characters and no white space.</para>
    /// <para>For more information, see rfc3461, section 4.4.</para>
    /// </remarks>
    /// <returns>The envelope identifier.</returns>
    /// <param name="message">The message.</param>
    protected override string GetEnvelopeId (MimeMessage message)
    {
        // Since you will want to be able to map whatever identifier you return here to the
        // message, the obvious identifier to use is probably the Message-Id value.
        return message.MessageId;
    }

    /// <summary>
    /// Get the types of delivery status notification desired for the specified recipient mailbox.
    /// </summary>
    /// <remarks>
    /// Gets the types of delivery status notification desired for the specified recipient mailbox.
    /// </remarks>
    /// <returns>The desired delivery status notification type.</returns>
    /// <param name="message">The message being sent.</param>
    /// <param name="mailbox">The mailbox.</param>
    protected override DeliveryStatusNotification? GetDeliveryStatusNotifications (MimeMessage message, MailboxAddress mailbox)
    {
        // In this example, we only want to be notified of failures to deliver to a mailbox.
        // If you also want to be notified of delays or successful deliveries, simply bitwise-or
        // whatever combination of flags you want to be notified about.
        return DeliveryStatusNotification.Failure;
    }
}

这将告诉SMTP服务器向您发送有关您发送的每封邮件的传递状态的电子邮件.

This will tell the SMTP server to send you emails about the delivery status of each message that you send.

这些邮件将具有 multipart/report 的顶级MIME类型，其 report-status 的 report-type 值.

These messages will have a top-level MIME-type of multipart/report with a report-type value of delivery-status.

换句话说， Content-Type 标头将如下所示:

In other words, the Content-Type header will look like this:

Content-Type: multipart/report; report-type=delivery-status; boundary=ajkfhkzfhkjhkjadskhz

一旦使用 MimeMessage.Load()解析了消息，就可以检查 Body 是否为具有预期的 MultipartReport > ReportType 属性值.

Once you parse the message with MimeMessage.Load(), you can check if the Body is a MultipartReport with the expected ReportType property value.

从那里，您可以找到类型为 MessageDeliveryStatus 的子部分(通常是我认为的第二部分).

From there, you can locate the child part that is of type MessageDeliveryStatus (typically the second part I think).

从那里，您将要检查 StatusGroups 属性(请参阅

From there, you will want to check the StatusGroups property (see http://www.mimekit.net/docs/html/P_MimeKit_MessageDeliveryStatus_StatusGroups.htm) - each HeaderList in the collection will have information for a different recipient.

您需要阅读StatusGroups文档中列出的RFC，以找出需要查找的可能的标头和值.

You'll need to read the RFC's listed in the StatusGroups docs to figure out what possible headers and values you will need to look for.

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