The following vb6 example codes demonstrate how to parse failure delivery report.
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
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).
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.
Before you can use the following sample codes, you should download the EAGetMail Installer and install it on your machine at first. Full sample projects are included in this installer.
To better demonstrate how to retrieve email and parse email, let’s create a VB 6.0 Standard EXE project at first, then add a CommandButton on the Form, double-click this button. It is like this
To use EAGetMail POP3 & IMAP4 ActiveX Object in your project,
the first step is
Add reference of EAGetMail to your project.
Please go to
References -> and select
EAGetMailObj ActiveX Object, click
the reference will be added to your project, and you can start to use it to retrieve email and parse email in your project.
The following example codes demonstrate parsing failure delivery report.
In order to run it correctly, please change
file name value to yours.
To get full sample projects, please download and install EAGetMail on your machine.
Option Explicit Private Sub ParseReport(ByVal emlFile As String) Const FailureReport = 0 Const DeliveryReceipt = 1 Const ReadReceipt = 2 Const Receipt_Deleted = 3 Const DelayedReport = 4 Dim oMail As New EAGetMailObjLib.Mail oMail.LicenseCode = "TryIt" oMail.LoadFile emlFile, False If Not oMail.IsReport Then MsgBox "this is not a report" Exit Sub End If Dim oReport As EAGetMailObjLib.MailReport Set oReport = oMail.GetReport() ' Get report type Select Case oReport.ReportType Case DeliveryReceipt MsgBox "This is a deliver receipt" Case ReadReceipt MsgBox "This is a read receipt" Case Receipt_Deleted MsgBox "This is a unread receipt, this email was deleted without read!" Case DelayedReport MsgBox "This is a delayed report, this email will be tried later by server automatically!" Case Else MsgBox "This is a failure report" End Select ' Get original message information MsgBox oReport.OriginalSender MsgBox oReport.OriginalRecipient MsgBox oReport.OriginalMessageID If oReport.ReportType = FailureReport Or oReport.ReportType = DelayedReport Then MsgBox oReport.ErrCode MsgBox oReport.ErrDescription MsgBox oReport.OriginalSubject MsgBox oReport.ReportMTA Dim oHeaders As EAGetMailObjLib.HeaderCollection Set oHeaders = oReport.OriginalHeaders Dim i, nCount As Integer nCount = oHeaders.Count For i = 0 To nCount - 1 Dim oHeader As EAGetMailObjLib.HeaderItem Set oHeader = oHeaders.Item(i) MsgBox oHeader.HeaderKey & ": " & oHeader.HeaderValue Next End If End Sub Private Sub Command1_Click() ParseReport "c:\my folder\test.eml" Exit Sub ErrorHandle: MsgBox Err.Description End Sub
Seperate builds of run-time dll for 32 and x64 platform
|Installation Path\Lib\native\x86\EAGetMailObj.dll||32 bit|
|Installation Path\Lib\native\x64\EAGetMailObj.dll||64 bit|
For VB6, C++, Delphi or other standard exe application, you can distribute EAGetMailObj.dll with your application to target machine without COM-registration and installer. To learn more detail, please have a look at Registration-free COM with Manifest File.
For ASP, VBScript, VBA, MS SQL Stored Procedure, you need to install EAGetMail on target machine by EAGetMail installer, both 32bit/x64 DLL are installed and registered.
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