Delphi DLL

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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var
success: Boolean;
email: HCkEmail;
json: HCkJsonObject;

begin
success := False;

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

email := CkEmail_Create();

success := CkEmail_LoadEml(email,'qa_data/eml/dsn_bounce.eml');
if (success = False) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

//  Only meaningful for a multipart/report email.
if (CkEmail_IsMultipartReport(email) = True) then
  begin
    json := CkJsonObject_Create();
    success := CkEmail_GetDsnInfo(email,json);
    if (success = True) then
      begin
        Memo1.Lines.Add(CkJsonObject__emit(json));
      end;
  end
else
  begin
    Memo1.Lines.Add('This email is not a multipart/report.');
  end;

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

CkEmail_Dispose(email);
    CkJsonObject_Dispose(json);