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ivan  
#1 Posted : Monday, May 2, 2011 5:25:57 PM(UTC)
ivan

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VB6 Example

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.

Code:

' 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

Option Explicit 

Private Sub ParseReport(ByVal emlFile As String) 

    Const FailureReport = 0 
    Const DeliveryReceipt = 1 
    Const ReadReceipt = 2 

    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 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 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 

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If you have any comments or questions about above example codes, please add your comments here.
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