EAGetMail POP3 & IMAP4 Component > Developer Center > Example Codes > Visual C++ > Parse Failure Delivery Report (NDS)

Visual C++ - Parse Failure Delivery Report (NDS)

Read Receipt

Some e-mail applications, such as Microsoft Office Outlook, employ a read-receipt tracking mechanism. A sender selects the receipt request option prior to sending the message. Upon opening the email, each recipient has the option of notifying the sender that the message was opened and read.

However, there is no guarantee that you will get a read-receipt. Some possible reason are that very few e-mail applications or services support read receipts, or simply because users disable the functionality. Those do support read-receipt aren't necessarily compatible with or capable of recognizing requests from a different e-mail service or application.

Delivery Receipt and Failure Report

It is also called a DSN (delivery service notification), which is a request to the recipient’s email server to send you a notification about the delivery of an email you've just sent. The notification takes the form of an email, and will tell you if your delivery succeeded (Delivery Receipt), failed, got delayed (Failure Report).

Parse Report

For many email campaign applications, the very important task is detecting if the email is received by recipient or not. Parsing the delivery report is the common way to get the email status. EAGetMail .NET class provides a built-in function (GetReport) to parse the report. The following sample demonstrates how to parse the delivery-report.

If ReporType is DeliveryReceipt or ReadReceipt, the report probably has only OriginalSender, OriginalRecipient and OriginalMessageID information in the report, it depends on the mail server that generated the report.

The following example codes demonstrate how to parse failure delivery report.

Installation

Before you can use the following sample codes, you should download the EAGetMail Installer and install it on your machine at first.

Add Reference of EAGetMail to Visual C++ Project

To use EAGetMail POP3 & IMAP4 ActiveX Object in your project, the first step is "Add header files of EAGetMail to your project". Please go to "C:\Program Files\EAGetMail\Samples_VS2008\pop3_imap4_simple.vcNative" or "C:\Program Files (x86)\EAGetMail\Samples_VS2008\pop3_imap4_simple.vcNative" folder, find "eagetmailobj.tlh" and "eagetmailobj.tli", and then copy these files to your project folder. Now you can start to use EAGetMail to retrieve email and parse email in your project.

add reference in C++

// The following example codes demonstrate parsing failure delivery report
// To get full sample projects, please download and install EAGetMail on your machine.
// To run it correctly, please change email server, user, password, folder, file name value to yours

#include "stdafx.h"

#include "eagetmailobj.tlh"
using namespace EAGetMailObjLib;

void ParseReport( LPCTSTR lpszEmlFile )
{
    const int FailureReport = 0;
    const int DeliveryReceipt = 1;
    const int ReadReceipt = 2;

    IMailPtr oMail;
    oMail.CreateInstance( "EAGetMailObj.Mail" );
    oMail->LicenseCode = _T("TryIt");
    oMail->LoadFile( lpszEmlFile, VARIANT_FALSE );

    if( oMail->IsReport == VARIANT_FALSE )
    {
        _tprintf( _T("This is not a report"));
        return;
    }

     // get report type
    IMailReportPtr oReport = oMail->GetReport();
    switch( oReport->ReportType )
    {
    case DeliveryReceipt:
        _tprintf( _T("This is a delivery receipt\r\n"));
        break;
    case ReadReceipt:
        _tprintf( _T("This is a read receipt\r\n"));
        break;
    default:
        _tprintf( _T("This is a failure delivery report\r\n"));
        break;

    }

    // get original message information
    _tprintf( _T("OriginalSender: %s\r\n"), (TCHAR*)oReport->OriginalSender );
    _tprintf( _T("OriginalRecipient: %s\r\n"), (TCHAR*)oReport->OriginalRecipient );
    _tprintf( _T("OriginalMessageID: %s\r\n"),(TCHAR*)oReport->OriginalMessageID );

    if( oReport->ReportType == FailureReport )
    {
        _tprintf( _T("ErrCode: %s\r\n"), (const TCHAR*)oReport->ErrCode);
        _tprintf( _T("ErrDescription: %s\r\n"), (const TCHAR*)oReport->ErrDescription );
        _tprintf( _T("OriginalSubject: %s\r\n"), (const TCHAR*)oReport->OriginalSubject );
        _tprintf( _T("ReportMTA: %s\r\n"), (const TCHAR*)oReport->ReportMTA );

        IHeaderCollectionPtr oHeaders;
        oHeaders = oReport->OriginalHeaders;
        int count = oHeaders->Count;
        for( int i = 0; i < count; i++ )
        {
            IHeaderItemPtr oHeader;
            oHeader = oHeaders->Item(i);
            ::_tprintf( _T("%s: %s\r\n"),
                (TCHAR*)oHeader->HeaderKey, (TCHAR*)oHeader->HeaderValue );
        }
    }
}

int _tmain(int argc, _TCHAR* argv[])
{
    // Initialize COM environment
    ::CoInitialize( NULL );

    ParseReport(_T("c:\\my folder\\test.eml"));

    return 0;
}

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Visual C++ - Parse Failure Delivery Report (NDS)

Read Receipt

Delivery Receipt and Failure Report

Parse Report

VC++ Email Examples

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