C#

Auto-Generate or Explicitly Specify the Message-ID Email Header

Demonstrates how to auto-generate or explicitly specify the Message-ID header field. C#

bool success = false;

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

email.Subject = "test";
email.Body = "test";
email.AddTo("Joe","joe@example1.com");
email.From = "mary@example2.com";

Chilkat.MailMan mailman = new Chilkat.MailMan();

//  When the mailman sends email, it renders the email to be sent,
//  and then sends the rendered MIME.

//  Instead of actually sending the email, this example will render
//  to MIME so we can see what would be sent..

//  We can explicitly set the Message-ID like this:
mailman.AutoGenMessageId = false;
email.AddHeaderField("Message-ID","<xyz123@abc>");

string mimeStr = mailman.RenderToMime(email);
Debug.WriteLine(mimeStr);

//  This is what we get:

//  MIME-Version: 1.0
//  Date: Mon, 20 Jul 2020 17:20:09 -0500
//  Message-ID: <xyz123@abc>
//  Content-Type: text/plain; charset=us-ascii; format=flowed
//  Content-Transfer-Encoding: 7bit
//  X-Priority: 3 (Normal)
//  Subject: test
//  To: Joe <joe@example1.com>
//  From: mary@example2.com
//  
//  test

Debug.WriteLine("--------");

//  If we auto-generate...
mailman.AutoGenMessageId = true;
mimeStr = mailman.RenderToMime(email);
Debug.WriteLine(mimeStr);

//  We get this:

//  MIME-Version: 1.0
//  Date: Mon, 20 Jul 2020 17:21:20 -0500
//  Message-ID: <04EDE096BBFE484967F6398A973B0FCF6EA09A44@CHILKATSLICE>
//  Content-Type: text/plain; charset=us-ascii; format=flowed
//  Content-Transfer-Encoding: 7bit
//  X-Priority: 3 (Normal)
//  Subject: test
//  To: Joe <joe@example1.com>
//  From: mary@example2.com
//  
//  test