VB.NET

Get a Report Part from a multipart/report Email

Demonstrates the Chilkat Email.GetReport method, which returns the body content of the Nth report within a multipart/report email. The NumReports property gives the count, and indexes are zero-based. This example loads a report email and prints each report part.

Background: A multipart/report message — used for bounces (DSNs) and read receipts (MDNs) — bundles machine-readable report parts alongside the human-readable explanation. GetReport returns the raw content of one such part so a program can parse it, for example to extract the failing recipient and status code from a bounce. Use GetDeliveryStatusInfo for direct field-level access to the delivery-status part.

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Dim success As Boolean = False

'  Demonstrates the GetReport method, which returns the body content of the Nth report
'  within a multipart/report email.  The NumReports property gives the number of reports;
'  indexes are zero-based.

Dim email As New Chilkat.Email

success = email.LoadEml("qa_data/eml/dsn_bounce.eml")
If (success = False) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If


Dim n As Integer = email.NumReports
Debug.WriteLine("NumReports = " & n)

Dim i As Integer
For i = 0 To n - 1
    Debug.WriteLine("---- Report " & i & " ----")
    Debug.WriteLine(email.GetReport(i))
Next

'  A report returned by GetReport is the body of a report part -- for a bounce (DSN),
'  that is the machine-readable message/delivery-status part.  It looks similar to:
'  
'    Reporting-MTA: dns; mail.example.com
'    Received-From-MTA: dns; sender.example.com
'    Arrival-Date: Fri, 10 Jul 2026 20:15:30 +0000
'  
'    Final-Recipient: rfc822; nonexistent@example.com
'    Action: failed
'    Status: 5.1.1
'    Diagnostic-Code: smtp; 550 5.1.1 <nonexistent@example.com> User unknown

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