在 C# 中解析 .eml 文件的建议
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Recommendations on parsing .eml files in C#
提问by adeel825
I have a directory of .eml files that contain email conversations. Is there a recommended approach in C# of parsing files of this type?
我有一个包含电子邮件对话的 .eml 文件目录。在 C# 中是否有推荐的方法来解析这种类型的文件？
回答by Samuel
What you probably need is an email/MIME parser. Parsing all the header field is not very hard, but separating out various MIME types like images, attachments, various text and html parts etc. can get very complex.
您可能需要的是电子邮件/MIME 解析器。解析所有的头字段并不是很困难，但是分离出各种 MIME 类型，如图像、附件、各种文本和 html 部分等会变得非常复杂。
We use a third party tool but there are many C# tools/libraries out there. Search for free C# email MIME parser in Google. Like I got this one:
我们使用第三方工具，但有很多 C# 工具/库。在 Google 中搜索免费的 C# 电子邮件 MIME 解析器。就像我得到了这个：
http://www.codeproject.com/Articles/11882/Advanced-MIME-Parser-Creator-Editorhttp://www.lumisoft.ee/lswww/download/downloads/Net/info.txt
http://www.codeproject.com/Articles/11882/Advanced-MIME-Parser-Creator-Editor http://www.lumisoft.ee/lswww/download/downloads/Net/info.txt
回答by Martin Vobr
Getting a decent MIME parser would be probably a way to go. You may try to use a free MIME parser (such as this onefrom codeproject) but comments from code author like this
获得一个像样的 MIME 解析器可能是一种方法。您可以尝试使用免费的 MIME 解析器（例如codeproject 中的这个解析器），但代码作者的评论是这样的
I worked on this at about the same time that I worked on a wrapper class for MSG files. Big difference in difficulty. Where the EML wrapper class maybe took a day to read the spec and get right, the MSG wrapper class took a week.
我在研究 MSG 文件的包装类的同时，我也在研究这个。难度差别很大。当EML包装类，也许花了一天来读取规格，并得到正确，味精包装类花了一个星期。
made me curious about the code quality. I'm sure that you can hack a mime parser which parses 95% of email correctly in a few days/hours. I'm also sure that getting right the remaining 5% will take months. Consider handling S/MIME (encrypted and signed email), unicode, malformed emails produced by misbehaving mail clients and servers, several encoding schemas, internationalization issues, making sure that intentionally mallformed emails will not crash your app, etc...
让我对代码质量感到好奇。我相信你可以破解一个 mime 解析器，它可以在几天/几小时内正确解析 95% 的电子邮件。我也确信要完成剩下的 5% 需要几个月的时间。考虑处理 S/MIME（加密和签名的电子邮件）、unicode、由行为不端的邮件客户端和服务器产生的格式错误的电子邮件、几种编码模式、国际化问题，确保故意格式错误的电子邮件不会使您的应用程序崩溃，等等......
If email you need to parse are comming from single source the quick & dirty parser may be enough. If you need to parse emails from the wild a better solution could be needed.
如果您需要解析的电子邮件来自单一来源，那么快速和肮脏的解析器可能就足够了。如果您需要解析来自野外的电子邮件，则可能需要更好的解决方案。
I would recommend our Rebex Secure Mail component, but I'm sure that you get decent result with components from other vendors as well.
我会推荐我们的Rebex Secure Mail 组件，但我相信您使用其他供应商的组件也能获得不错的结果。
Making sure that the parser of your choice is working correctly on the infamous "Mime Torture Sample message" prepared by Mike Crispin (co-author of MIME and IMAP RFCs). The testing message is displayed in MIME Explorer sampleand can be downloadedin the installation package.
确保您选择的解析器在 Mike Crispin（MIME 和 IMAP RFC 的合著者）准备的臭名昭著的“Mime Torture 示例消息”上正常工作。所述显示MIME资源管理样品中的测试消息，并且可以下载安装程序包。
Following code shows how to read and parse EML file:
以下代码显示了如何读取和解析 EML 文件：
using Rebex.Mail;
MailMessage message = new MailMessage();
message.Load("file.eml");
回答by Mauricio Scheffer
回答by Ries Vriend
I posted a sample project to illustrate this answer to Github
我向 Github发布了一个示例项目来说明这个答案
The CDO COM DLL is part of Windows/IIS and can be referenced in .net. It will provide accurate parsing and a nice object model. Use it in conjuction with a reference to ADODB.DLL.
CDO COM DLL 是 Windows/IIS 的一部分，可以在 .net 中引用。它将提供准确的解析和一个很好的对象模型。将它与对 ADODB.DLL 的引用结合使用。
public CDO.Message LoadEmlFromFile(String emlFileName)
{
CDO.Message msg = new CDO.MessageClass();
ADODB.Stream stream = new ADODB.StreamClass();
stream.Open(Type.Missing, ADODB.ConnectModeEnum.adModeUnknown, ADODB.StreamOpenOptionsEnum.adOpenStreamUnspecified, String.Empty, String.Empty);
stream.LoadFromFile(emlFileName);
stream.Flush();
msg.DataSource.OpenObject(stream, "_Stream");
msg.DataSource.Save();
stream.Close();
return msg;
}
-- Added August 2017: Also check out MimeKit: https://github.com/jstedfast/MimeKit. It supports .Netstandard, so will run cross-platform.
-- 2017 年 8 月添加：另请查看 MimeKit：https: //github.com/jstedfast/MimeKit。它支持.Netstandard，因此可以跨平台运行。
回答by kenorb
Try:
尝试：
- febootimail
- SmtpExpress
- LinkWS Newsletter Turbo
- emlBridge - importing eml files into Outlook and virtually any other email client
- Newsletter 2.1 Turbo
- ThunderStor(emlResender)
- Ruby (using eml2mbox). See jimbob method.
- Evolution - create new message, attach the eml file,
- feboot邮件
- SMTP快递
- LinkWS 时事通讯 Turbo
- emlBridge - 将 eml 文件导入 Outlook 和几乎任何其他电子邮件客户端
- 时事通讯 2.1 Turbo
- ThunderStor(emlResender)
- Ruby（使用eml2mbox）。见jimbob方法。
- Evolution - 创建新消息，附加 eml 文件，
Write a program:
编写程序：
- in C# (See [this][4] and this). See: Source code.
- using Rebel Secure Mail library
- .NET (See this, thisand this)
Workarounds:
解决方法：
- $ cat mail.eml | mail -s -c But headers won't be parsed, neither attachments.
- drop them into your GMail (Firefox will save them as attachments)
- $ cat mail.eml | mail -s -c 但是不会解析标题，也不会解析附件。
- 将它们放入您的 GMail（Firefox 会将它们保存为附件）
回答by Yahoo Serious
I just started using the Mime-part of Papercutfor this. It seems decent and simple at first sight.
为此，我刚刚开始使用Papercut的 Mime 部分。乍一看，它看起来体面而简单。
public void ProcessRawContents(string raw)
{
// NB: empty lines may be relevant for interpretation and for content !!
var lRawLines = raw.Split(new []{"\r\n"}, StringSplitOptions.None);
var lMailReader = new MimeReader(lRawLines);
var lMimeEntity = lMailReader.CreateMimeEntity();
MailMessageEx Email = lMimeEntity.ToMailMessageEx();
// ...
}
(MailMessageExis, of course, derived from MailMessage.)
（MailMessageEx当然，源自MailMessage。）
回答by Sujeewa
Follow this link for a good solution:
The summary of the article is 4 steps(The second step below is missing in the article but needed):
文章总结为4个步骤（下面的第二步文章中缺少但需要）：
Add a reference to "Microsoft CDO for Windows 2000 Library", which can be found on the ‘COM' tab in the Visual Studio ‘Add reference' dialog. This will add 2 references to "ADODB" and "CDO" in your project.
Disable embedding of Interop types for the 2 reference "ADODB" and "CDO". (References -> ADODB -> Properties -> Set 'Embed Interop Types' to False and repeat the same for CDO)
Add the following method in your code:
protected CDO.Message ReadMessage(String emlFileName) { CDO.Message msg = new CDO.MessageClass(); ADODB.Stream stream = new ADODB.StreamClass(); stream.Open(Type.Missing, ADODB.ConnectModeEnum.adModeUnknown, ADODB.StreamOpenOptionsEnum.adOpenStreamUnspecified, String.Empty, String.Empty); stream.LoadFromFile(emlFileName); stream.Flush(); msg.DataSource.OpenObject(stream, "_Stream"); msg.DataSource.Save(); return msg; }Call this method by passing the full path of your eml file and the CDO.Message object it returns will have all the parsed info you need including To,From, Subject, Body.
添加对“Microsoft CDO for Windows 2000 库”的引用，该引用可在 Visual Studio 的“添加引用”对话框的“COM”选项卡上找到。这将在您的项目中添加 2 个对“ADODB”和“CDO”的引用。
禁用嵌入 2 个参考“ADODB”和“CDO”的互操作类型。（参考 -> ADODB -> 属性 -> 将“嵌入互操作类型”设置为 False 并对 CDO 重复相同的操作）
在您的代码中添加以下方法：
protected CDO.Message ReadMessage(String emlFileName) { CDO.Message msg = new CDO.MessageClass(); ADODB.Stream stream = new ADODB.StreamClass(); stream.Open(Type.Missing, ADODB.ConnectModeEnum.adModeUnknown, ADODB.StreamOpenOptionsEnum.adOpenStreamUnspecified, String.Empty, String.Empty); stream.LoadFromFile(emlFileName); stream.Flush(); msg.DataSource.OpenObject(stream, "_Stream"); msg.DataSource.Save(); return msg; }通过传递您的 eml 文件的完整路径来调用此方法，它返回的 CDO.Message 对象将包含您需要的所有解析信息，包括 To、From、Subject、Body。
回答by ofthelit
Aspose.Email for .NET
Aspose.Email for .NET
Aspose.Email for .NET is a collection of components for working with emails from within your .NET applications. It makes it easy to work with a number of email message formats and message storage files (PST/OST) along with message sending and receiving capabilities.
Aspose.Email makes it easy to create, read and manipulate a number of message formats such as MSG, EML, EMLX and MHT files without the need of installing Microsoft Outlook. You can not only change the message contents, but also manipulate (add, extract and remove) attachments from a message object. You can customize message headers by adding or removing recipients, changing the subject or other properties. It also gives you complete control over an email message by providing access to its Mapi properties.
Aspose.Email for .NET 是一组用于在 .NET 应用程序中处理电子邮件的组件。它可以轻松处理多种电子邮件消息格式和消息存储文件 (PST/OST) 以及消息发送和接收功能。
Aspose.Email 可以轻松创建、阅读和操作多种消息格式，例如 MSG、EML、EMLX 和 MHT 文件，而无需安装 Microsoft Outlook。您不仅可以更改消息内容，还可以操作（添加、提取和删除）消息对象中的附件。您可以通过添加或删除收件人、更改主题或其他属性来自定义邮件标题。它还通过提供对其 Mapi 属性的访问权限，使您可以完全控制电子邮件。
- http://www.aspose.com/.net/email-component.aspx
- https://www.nuget.org/packages/Aspose.Email/
- There is an evaluation version with the following limitations: http://www.aspose.com/docs/display/emailnet/Licensing
- http://www.aspose.com/.net/email-component.aspx
- https://www.nuget.org/packages/Aspose.Email/
- 有一个具有以下限制的评估版本：http: //www.aspose.com/docs/display/emailnet/Licensing
C# Outlook MSG file reader without the need for Outlook
C# Outlook MSG 文件阅读器，无需 Outlook
MSGReader is a C# .NET 4.0 library to read Outlook MSG and EML (Mime 1.0) files. Almost all common object in Outlook are supported.
MSGReader 是一个 C# .NET 4.0 库，用于读取 Outlook MSG 和 EML (Mime 1.0) 文件。几乎支持 Outlook 中的所有常见对象。
