Send MIME Bytes from a BinData via SMTP

See more SMTP Examples

Demonstrates the Chilkat MailMan.SendMimeBd method, which sends an email from caller-supplied MIME bytes held in a BinData. The arguments are the from address, the recipient list (the SMTP envelope recipients), and the BinData containing the MIME. This example loads a .eml file into a BinData and sends it.

Important: When sending caller-supplied MIME, ensure the Message-ID header is unique for each message. Sending MIME whose Message-ID was previously used can cause the message to be silently discarded as a duplicate by mail servers — see chilkatsoft.com/email_duplicate_message_id.asp.

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.MailMan,
  Chilkat.BinData;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  bdMime: TBinData;

begin
  success := False;

  //  Demonstrates the MailMan.SendMimeBd method, which sends an email from caller-supplied MIME
  //  bytes held in a BinData.  The arguments are the from address, the recipient list (the SMTP
  //  envelope recipients), and the BinData containing the MIME.

  mailman := TMailMan.Create;

  //  Configure the SMTP server connection.
  mailman.SmtpHost := 'smtp.example.com';
  mailman.SmtpPort := 465;
  mailman.SmtpSsl := True;
  mailman.SmtpUsername := 'user@example.com';
  mailman.SmtpPassword := 'myPassword';

  //  Load the MIME bytes to send.  Here we read a .eml file, but the bytes could come from
  //  any source.
  bdMime := TBinData.Create;
  success := bdMime.LoadFile('qa_data/eml/message.eml');
  if (success = False) then
    begin
      WriteLn(bdMime.LastErrorText);
      Exit;
    end;

  //  IMPORTANT: When sending caller-supplied MIME, make sure the Message-ID header is unique
  //  for each message.  Sending MIME that contains a Message-ID that was previously sent can
  //  cause the message to be silently discarded as a duplicate by mail servers.  For details,
  //  see: https://www.chilkatsoft.com/email_duplicate_message_id.asp

  //  Send the MIME bytes to the envelope recipient(s).
  success := mailman.SendMimeBd('alice@example.com','bob@example.com',bdMime);
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  WriteLn('MIME email sent.');

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

  //  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
  //  connects and authenticates -- using the property settings above -- whenever a server
  //  operation requires it.  Calling the explicit connect/authenticate methods can still be
  //  helpful to determine whether a failure occurs while connecting or while authenticating.


  mailman.Free;
  bdMime.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.