Objective-C

Check Whether an Email Is a multipart/report

Demonstrates the Chilkat Email.IsMultipartReport method, which returns true when the top-level message structure is a multipart/report (such as a bounce/DSN or a read receipt/MDN). This example loads an email and reports whether it is a multipart/report.

Background: Automated mail — delivery failures and read receipts — arrives wrapped in the multipart/report structure, which carries machine-readable report parts. Detecting it with IsMultipartReport is the first step in a bounce-handling pipeline: once you know a message is a report, you can pull its parts with GetReport or read delivery fields with GetDeliveryStatusInfo to act on failures automatically.

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Objective-C

#import <CkoEmail.h>

BOOL success = NO;

//  Demonstrates the IsMultipartReport method, which returns true if the top-level message
//  structure is a multipart/report (such as a bounce / DSN or a read receipt / MDN).

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

success = [email LoadEml: @"qa_data/eml/dsn_bounce.eml"];
if (success == NO) {
    NSLog(@"%@",email.LastErrorText);
    return true;
}

if ([email IsMultipartReport] == YES) {
    NSLog(@"%@",@"This email is a multipart/report (e.g. a bounce or read receipt).");
}
else {
    NSLog(@"%@",@"This email is not a multipart/report.");
}

//  Note: The path "qa_data/..." is a relative local filesystem path,
//  relative to the current working directory of the running application.