使用SmtpClient时如何保存电子邮件而不是发送？

I am using SmtpClient to send an email with an attachment. However for a certain batch we need to somehow save the MailMessage instead of sending them. We are then thinking/hoping to manually upload the messages to the users drafts folder.

我正在使用SmtpClient发送带附件的电子邮件。但是对于某个批处理，我们需要以某种方式保存MailMessage而不是发送它们。然后我们考虑/希望手动将消息上传到用户草稿文件夹。

Is it possible to save these messages with the attachment intact (impossible, I would have thought). Or alternatively upload the messages to a folder in the users account?

是否可以保存这些消息与附件完整（不可能，我会想到）。或者将邮件上传到用户帐户中的文件夹？

If anyone has any experience of this, I'd much appreciate a bit of help or a pointer.

如果有人对此有任何经验，我会非常感谢一些帮助或指针。

5 个解决方案

#1

When testing in ASP.NET we save our emails to a folder rather then send them through an email server. Maybe you could change yourweb.config settings like this for your batch?

在ASP.NET中测试时，我们将电子邮件保存到文件夹，而不是通过电子邮件服务器发送。也许您可以为您的批次更改这样的yourweb.config设置？

<system.net>
  <mailSettings>
    <smtp deliveryMethod="SpecifiedPickupDirectory">
      <specifiedPickupDirectory pickupDirectoryLocation="c:\Temp\mail\"/>
    </smtp>
  </mailSettings>
</system.net>

Additional Info:

附加信息：

MSDN: <specifiedPickupDirectory> Element (Network Settings)
MSDN：元素（网络设置）
Configuring SmtpClient to drop emails in a folder on disk
配置SmtpClient以删除磁盘上文件夹中的电子邮件

#2

As well as the SpecifiedPickupDirectory information of the other answers, if you want to ensure your emails are sent to a folder relative to the site root - handy in testing on build servers where you don't know the paths - you can add a quick check in your email sending code:

除了其他答案的SpecifiedPickupDirectory信息，如果您想确保将您的电子邮件发送到相对于站点根目录的文件夹 - 在您不知道路径的构建服务器上进行测试时很方便 - 您可以添加快速检查在您的电子邮件中发送代码

    SmtpClient client = new SmtpClient();
    ...

    // Add "~" support for pickupdirectories.
    if (client.DeliveryMethod == SmtpDeliveryMethod.SpecifiedPickupDirectory && client.PickupDirectoryLocation.StartsWith("~"))
    {
        string root = AppDomain.CurrentDomain.BaseDirectory;
        string pickupRoot = client.PickupDirectoryLocation.Replace("~/", root);
        pickupRoot = pickupRoot.Replace("/",@"\");
        client.PickupDirectoryLocation = pickupRoot;
    }

And your tests will look something like this (make sure you use App_Data so IIS can write to the folder):

你的测试看起来像这样（确保你使用App_Data，所以IIS可以写入文件夹）：

    // Arrange - get SitePath from AppDomain.Current.BaseDirectory + ..\
    string pickupPath = Path.Combine(SitePath, "App_Data", "TempSmtp");
    if (!Directory.Exists(pickupPath))
        Directory.CreateDirectory(pickupPath);

    foreach (string file in Directory.GetFiles(pickupPath, "*.eml"))
    {
        File.Delete(file);
    }

    // Act (send some emails)

    // Assert
    Assert.That(Directory.GetFiles(pickupPath, "*.eml").Count(), Is.EqualTo(1));

#3

This can help - Adding Save() functionality to Microsoft.Net.Mail.MailMessage
The main ideia, make an extension to MailMessage ,that by reflection making a save method.

这可以提供帮助 - 将保存（）功能添加到Microsoft.Net.Mail.MailMessage主要的ideia，对MailMessage进行扩展，通过反射创建一个save方法。

#4

You can configure this with the system.net setting in your web.config / app.config file.

您可以使用web.config / app.config文件中的system.net设置对其进行配置。

<system.net>
  <mailSettings>
    <smtp deliveryMethod="Network">
      <network host="mail.mydomain.com" port="25" />
    </smtp>
    <!-- Use this setting for development
    <smtp deliveryMethod="SpecifiedPickupDirectory">
      <specifiedPickupDirectory pickupDirectoryLocation="C:\Temp" />
    </smtp>
    -->
  </mailSettings>
</system.net>

Also, here's a link with info on migrating from System.Web.Mail to System.Net.Mail.

此外，这是一个链接，其中包含从System.Web.Mail迁移到System.Net.Mail的信息。

#5

A bug also requires adding as a workaround in some versions of the framework. So the completed version looks like:

错误还需要在框架的某些版本中添加作为变通方法。所以完成的版本看起来像：

<system.net>
  <mailSettings>
    <smtp deliveryMethod="SpecifiedPickupDirectory">
        <specifiedPickupDirectory pickupDirectoryLocation="c:\Temp\mail\"/>
        <network host="localhost" />
    </smtp>
  </mailSettings>
</system.net>

#1