Objective-C

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

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

#import <CkoEmail.h>
#import <CkoMailMan.h>
#import <NSString.h>

BOOL success = NO;

CkoEmail *email = [[CkoEmail alloc] init];

email.Subject = @"test";
email.Body = @"test";
[email AddTo: @"Joe" emailAddress: @"joe@example1.com"];
email.From = @"mary@example2.com";

CkoMailMan *mailman = [[CkoMailMan alloc] init];

//  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 = NO;
[email AddHeaderField: @"Message-ID" fieldValue: @"<xyz123@abc>"];

NSString *mimeStr = [mailman RenderToMime: email];
NSLog(@"%@",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

NSLog(@"%@",@"--------");

//  If we auto-generate...
mailman.AutoGenMessageId = YES;
mimeStr = [mailman RenderToMime: email];
NSLog(@"%@",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