MSGReader is a C# .NET 4.6.1 and Standard 2.1 library to read Outlook MSG and EML (Mime 1.0) files. Almost all common object in Outlook are supported:

• E-mail
• Appointment
• Task
• Contact card
• Sticky note

It supports all body types there are in MSG files, this includes:

• Text
• HTML
• HTML embedded into RTF
• RTF

MSGReader has only a few options to manipulate an MSG file. The only option you have is that you can remove attachments and then save the file to a new one.

If you realy want to write MSG files then see my MsgKit project on GitHub (https://github.com/Sicos1977/MsgKit)

using (var msg = new MsgReader.Outlook.Storage.Message("d:\\testfile.msg"))
{
        var from = msg.Sender;
        var sentOn = msg.SentOn;
        var recipientsTo = msg.GetEmailRecipients(MsgReader.Outlook.RecipientType.To, false, false);
        var recipientsCc = msg.GetEmailRecipients(MsgReader.Outlook.RecipientType.Cc, false, false);
        var subject = msg.Subject;
        var htmlBody = msg.BodyHtml;
        // etc...
}

var fileInfo = new FileInfo("d:\\testfile.eml");
var eml = MsgReader.Mime.Message.Load(fileInfo);

if (eml.Headers != null)
{
        if (eml.Headers.To != null)
        {
            foreach (var recipient in eml.Headers.To)
            {
                var to = recipient.Address;            
            }
        }
}

var subject = eml.Headers.Subject;

if (eml.TextBody != null)
{
        var textBody = System.Text.Encoding.UTF8.GetString(eml.TextBody.Body);
}

if (eml.HtmlBody != null)
{
        var htmlBody = System.Text.Encoding.UTF8.GetString(eml.HtmlBody.Body);
}

// etc...

This example deletes the first attachment

var outlook = new Storage.Message(fileName, FileAccess.ReadWrite);
outlook.DeleteAttachment(outlook.Attachments[0]);
outlook.Save("d:\\deleted.msg");

• Kees van Spelde

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The easiest way to install MSGReader is via NuGet.

In Visual Studio's Package Manager Console, simply enter the following command:

Install-Package MSGReader

This project can also be used from a COM based language like VB script or VB6. To use it first compile the code and register the com visible assembly with the command:

Regasm.exe /codebase MsgReader.dll

After that you can call it like this:

dim msgreader

set msgreader = createobject("MsgReader.Reader")
msgreader.ExtractToFolderFromCom "the msg file to read", "the folder where to place the extracted files"

MsgReader is Copyright (C) 2013-2021 Magic-Sessions and is licensed under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Sicos1977 (Kees van Spelde)

If you like my work then please consider a donation as a thank you.