Pascal (Lazarus/Delphi)
Pascal (Lazarus/Delphi)
Read Delivery-Status Fields from a Bounce
See more Email Object Examples
Demonstrates the Chilkat Email.GetDeliveryStatusInfo method, which returns a named field from the message/delivery-status part of a delivery-status notification (DSN). It should be called only for an email identified as a delivery-status notification. This example loads a bounce message and reads its Action, Status, and Final-Recipient fields.
Background: When a message can't be delivered, the mail system returns a bounce as a
multipart/report whose message/delivery-status part carries machine-readable fields: Action (e.g. failed), Status (a numeric code like 5.1.1 meaning "no such mailbox"), and Final-Recipient (the address that failed). Parsing these lets a program automatically detect hard bounces and prune bad addresses from a mailing list.Chilkat Pascal (Lazarus/Delphi) Downloads
program ChilkatDemo;
// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}
uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
SysUtils,
CkDllLoader,
Chilkat.Email;
// ---------------------------------------------------------------------------
procedure RunDemo;
var
success: Boolean;
email: TEmail;
begin
success := False;
// Demonstrates the GetDeliveryStatusInfo method, which returns a field from the
// message/delivery-status part of a delivery-status notification (DSN / bounce).
// Call it only for an email that is a delivery-status notification.
email := TEmail.Create;
success := email.LoadEml('qa_data/eml/dsn_bounce.eml');
if (success = False) then
begin
WriteLn(email.LastErrorText);
Exit;
end;
// Read individual fields from the message/delivery-status part.
WriteLn('Action: ' + email.GetDeliveryStatusInfo('Action'));
WriteLn('Status: ' + email.GetDeliveryStatusInfo('Status'));
WriteLn('Final-Recipient: ' + email.GetDeliveryStatusInfo('Final-Recipient'));
// Note: The path "qa_data/..." is a relative local filesystem path,
// relative to the current working directory of the running application.
email.Free;
end;
// ---------------------------------------------------------------------------
begin
try
RunDemo;
except
on E: Exception do
WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
end;
WriteLn;
{$IFDEF MSWINDOWS}
WriteLn('Press Enter to exit...');
ReadLn;
{$ENDIF}
end.