VB.NET

Get Delivery-Status Info as JSON

Demonstrates the Chilkat Email.GetDsnInfo method, which — when IsMultipartReport indicates the email is a multipart/report — obtains the delivery-status information as a JsonObject. This example loads a bounce message, confirms it is a report, and prints the extracted DSN details as JSON.

Background: A bounce (DSN) carries its key facts — which recipient failed, the status code, the reporting server — in a machine-readable message/delivery-status part. Rather than parsing those raw fields yourself, GetDsnInfo gathers them into a structured JSON document you can query with the JsonObject API, making it easy to automate bounce handling and prune failed addresses from a mailing list.

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VB.NET

Dim success As Boolean = False

'  Demonstrates the GetDsnInfo method, which, for a multipart/report email, obtains the
'  delivery-status information as a JSON object.

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


'  Only meaningful for a multipart/report email.
If (email.IsMultipartReport() = True) Then
    Dim json As New Chilkat.JsonObject
    success = email.GetDsnInfo(json)
    If (success = True) Then
        Debug.WriteLine(json.Emit())
    End If

Else
    Debug.WriteLine("This email is not a multipart/report.")
End If


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