B4X

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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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 ChilkatEmail
email.Initialize

success = email.LoadEml("qa_data/eml/dsn_bounce.eml")
If success = False Then
    Log(email.LastErrorText)
    Return
End If


'  Only meaningful for a multipart/report email.
If email.IsMultipartReport = True Then
    Dim json As ChilkatJsonObject
    json.Initialize
    success = email.GetDsnInfo(json)
    If success = True Then
        Log(json.Emit)
    End If

Else
    Log("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.