Attach Message to Email (message/rfc822)

Download: Chilkat .NET Assemblies

How to create an email with an attached message (content-type = message/rfc822)

Chilkat.Email email = new Chilkat.Email();

email.Subject = "Subject...";
email.From = "Chilkat Support <support@chilkatsoft.com>";

//  Call AddTo multiple times, once per recipient, or
//  call AddMultipleTo with a comma-separated email address string.
//  or call AddHeaderField("To","To someone...")
email.AddTo("Chilkat Admin","admin@chilkatsoft.com");

//  Add our own custom header.
email.AddHeaderField("X-MyCompany","testing");

email.Body = "This is the email body...";

//  The email object now has a very basic plain-text email,
//  with a customer header.

//  The email we'll add is going to be loaded from a .eml file:
bool success;
success = email.AddFileAttachment2("email.eml","message/rfc822");
if (success != true) {
    MessageBox.Show(email.LastErrorText);
}
else {
    email.SaveEml("out.eml");
    MessageBox.Show("Success!");
}