Pascal (Lazarus/Delphi)

SMTP Inspection

See more SMTP Examples

Examine an SMTP session to view all communications sent to the SMTP server. Pascal (Lazarus/Delphi)

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.Email;

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

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  email: TEmail;
  mimeStr: string;

begin
  success := False;

  mailman := TMailMan.Create;

  mailman.SmtpHost := 'smtp.example.com';
  mailman.SmtpUsername := 'myUsername';
  mailman.SmtpPassword := 'myPassword';

  mailman.SmtpPort := 465;
  mailman.StartTLS := True;

  email := TEmail.Create;

  email.Subject := 'This is a test';
  email.Body := 'This is a test';
  email.From := 'Alex <alex@example.com>';
  email.AddTo('Christoph','christoph@example2.com');
  email.AddBcc('Victor','victor@example3.com');

  //  Generate the MIME that is sent when SendEmail is called
  mimeStr := mailman.RenderToMime(email);
  WriteLn(mimeStr);

  success := mailman.SendEmail(email);
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  success := mailman.CloseSmtpConnection();
  if (success <> True) then
    begin
      WriteLn('Connection to SMTP server not closed cleanly.');
    end;

  //  Examine the SMTP session log.
  WriteLn('----');
  WriteLn('Smtp Session Log:');
  WriteLn(mailman.SmtpSessionLog);

  //  ---------------------------------------------------
  //  Sample output:
  //  ---------------------------------------------------

  //  MIME-Version: 1.0
  //  Date: Fri, 06 Mar 2026 16:21:00 -0600
  //  Message-ID: <A5DC25990C93EC2676F4FBB2BB3BFA9EB34FF9D3@CHILKAT25>
  //  Content-Type: text/plain; charset=us-ascii; format=flowed
  //  Content-Transfer-Encoding: 7bit
  //  X-Priority: 3 (Normal)
  //  Subject: This is a test
  //  From: Alex <alex@example.com>
  //  To: Christoph <christoph@example2.com>
  //  Bcc: Victor <victor@example3.com>
  //  
  //  This is a test
  //  ----
  //  Smtp Session Log:
  //  220 smtp.example.com ESMTP Amazon WorkMail SMTP Service
  //  EHLO MYCOMPUTER<CRLF>
  //  250-smtp.example.com
  //  250-8BITMIME
  //  250-AUTH PLAIN LOGIN
  //  250 Ok
  //  AUTH LOGIN<CRLF>
  //  334 VXNlcm5hbWU6
  //  YWRtaW5AY2hpbGthdHNvZnQuY29t<CRLF>
  //  334 UGFzc3dvcmQ6
  //  {PasswordOrCredentials}
  //  235 Authentication successful.
  //  MAIL FROM:<alex@example.com><CRLF>
  //  250 Ok
  //  RCPT TO:<christoph@example2.com><CRLF>
  //  250 Ok
  //  RCPT TO:<victor@example3.com><CRLF>
  //  250 Ok
  //  DATA<CRLF>
  //  354 End data with <CR><LF>.<CR><LF>
  //  {388 bytes} <--- The MIME source of the email (examined via RenderToMime) was sent here.
  //  <CRLF>.<CRLF>
  //  250 Ok
  //  QUIT<CRLF>
  //  221 Bye


  mailman.Free;
  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.