This project originated from the Simple-MAPI-NET article on CodeProject site. There has been a few important fixes in this project since the original was imported.

PM> Install-Package Simple-MAPI.NET

Simple MAPI.NET allows you to create an email message using the user's default email client on Windows.

You can set a subject, body and attachments and invoke the default email client (eg Outlook/Windows Mail), ready to send.

It's useful if you want to create an email for the user, without sending it yourself using SMTP etc.

Simple MAPI is an old technology and it's basically deprecated - Microsoft warns that the use of Simple MAPI is discouraged and that it may be unavailable in later versions of Windows

But it's the only way, I know, to invoke the default Email client and set subject/body and attachments on Windows without using interops or anything Office-specific. Simple MAPI is just a set of functions and related data structures, in Windows, that this library calls.

It still works on Windows 10, with Outlook as the email client.

I have used it, with success, like this:

using Win32Mapi;

.
var mapi = new SimpleMapi();
mapi.AddRecipient(name: "[email protected]", addr: null, cc: false);
mapi.Attach(filepath: "c:\\bob.txt");
mapi.Send(subject: "a subject", noteText: "a body text");

I don't use Logon/off() because it used to cause issues (only in 64-bit Office/Outlook) and showed a superflous error but sent anyway - but I may need to revisit that choice.

dotnet build src/Mapi/SimpleMapi.SDK.csproj

Cutting a release is described in RELEASING.md.

I was using this source code within the ExceptionReporter.NET project.

I copied it, with internal attribution, from the article on Simple-MAPI-NET on the Code Project site. But I noticed that no one else had committed this code a to a repository... so, me to the rescue.

This way, I could use the library as a dependency rather than horde a load of unrelated code in the project - and get fixes and suggestions from the community!