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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发送状态。这是我第一次尝试得到这个,在一些 RnD 之后,我知道我们必须在某个地方设置或传递 report-type=delivery-status,但我不知道在我读到这个的文档中在哪里做这个. 我也尝试覆盖 DeliveryStatusNotification,但一无所获。可能是我在错误的方向上获取通知/状态。

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

我知道@jstedfast 在这里很活跃。我需要你的帮助。我没有得到任何指示来做这件事。提前致谢。

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1 回答 1

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您需要做的第一件事是子类 SmtpClient 就像文档中的示例一样:

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条消息的传递状态的电子邮件。

这些消息将具有顶级 MIME 类型,multipart/reportreport-type值为delivery-status

换句话说,Content-Type标题将如下所示:

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

使用 解析消息后MimeMessage.Load(),您可以检查 是否 Body具有MultipartReport预期的ReportType属性值。

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

从那里,您将要检查StatusGroups属性(请参阅http://www.mimekit.net/docs/html/P_MimeKit_MessageDeliveryStatus_StatusGroups.htm) -HeaderList集合中的每个都将具有不同收件人的信息。

您需要阅读 StatusGroups 文档中列出的 RFC,以了解您需要查找哪些可能的标头和值。

于 2017-07-11T20:59:46.927 回答