JavaScript

Count the Report Parts in a multipart/report Email

Demonstrates the read-only Chilkat Email.NumReports property, which is the number of report parts in a multipart/report email. A part is counted as a report when its Content-Type is message/* (except message/rfc822) or text/rfc822-headers. Use GetReport to retrieve the body of each report part; indexes are zero-based. This example loads a report email and prints each report part.

Background: When a message can't be delivered, the mail system usually sends back a bounce known as a Delivery Status Notification (DSN). DSNs use the multipart/report structure, which bundles several parts: a human-readable explanation, a machine-readable message/delivery-status part describing exactly what happened (recipient, status code, failing server), and often the original message's headers. Reading these report parts lets a program automatically detect and process bounces.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  Demonstrates the read-only Email.NumReports property, which is the number of report
//  parts in a multipart/report email (for example, a Delivery Status Notification).
//  Use GetReport to retrieve the body of each report part.  Indexes are zero-based.

var email = new CkEmail();

//  Load a multipart/report email (such as a bounce / DSN message).
success = email.LoadEml("qa_data/eml/dsn_bounce.eml");
if (success == false) {
    console.log(email.LastErrorText);
    return true;
}

var n = email.NumReports;
console.log("NumReports = " + n);

var i;
for (i = 0; i <= n - 1; i++) {
    console.log("---- Report " + i + " ----");
    console.log(email.GetReport(i));
}