Objective-C

Attach an Email to Another Email

Demonstrates the Chilkat Email.AttachEmail method, which attaches a copy of another email to this email object. The attached email is encapsulated in a message/rfc822 subpart. Because a copy is attached, later changes to the source email do not affect the embedded message. This example attaches one email to another.

Background: "Forward as attachment" produces exactly this structure: the original message is embedded whole as a message/rfc822 part rather than quoted into the body. This preserves the original's headers and formatting intact, which matters for forwarding to a mailbox that will re-parse it, or for reporting spam/phishing with the original evidence attached. Such parts are counted by NumAttachedMessages.

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Objective-C

#import <CkoEmail.h>

BOOL success = NO;

//  Demonstrates the AttachEmail method, which attaches a copy of another email to this email
//  object.  The attached email is encapsulated in a message/rfc822 subpart.

CkoEmail *innerEmail = [[CkoEmail alloc] init];
innerEmail.Subject = @"Original message";
innerEmail.From = @"alice@example.com";
innerEmail.Body = @"This is the original message being forwarded.";

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"FW: Original message";
email.From = @"bob@example.com";
email.Body = @"See the attached original email.";

//  Attach a copy of the inner email as a message/rfc822 part.

success = [email AttachEmail: innerEmail];
if (success == NO) {
    NSLog(@"%@",email.LastErrorText);
    return true;
}

NSLog(@"%@%d",@"NumAttachedMessages = ",[email.NumAttachedMessages intValue]);