Pascal (Lazarus/Delphi)

Office365 Send Email using SMTP with OAuth2 Authentication

See more Office365 Examples

Demonstrates how to send email from smtp.office365.com using OAuth2 authentication. 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,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  jsonToken: TJsonObject;
  mailman: TMailMan;
  email: TEmail;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  //  An Office365 OAuth2 access token must first be obtained prior
  //  to running this code.

  //  Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
  //  interactive authorization via a web browser.  Afterwards, the access token
  //  can be repeatedly refreshed automatically (with no user interaction).

  //  See the following examples for getting and refreshing an OAuth2 access token

  //  Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
  //  Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

  //  First get our previously obtained OAuth2 access token.
  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/office365.json');

  mailman := TMailMan.Create;

  mailman.SmtpHost := 'smtp.office365.com';
  mailman.SmtpPort := 587;
  mailman.StartTLS := True;

  //  Use your Office365 email address for the SmtpUsername.
  mailman.SmtpUsername := 'OFFICE365_EMAIL_ADDRESS';
  mailman.OAuth2AccessToken := jsonToken.StringOf('access_token');

  //  Create a new email object
  email := TEmail.Create;

  email.Subject := 'This is a test';
  email.Body := 'This is a test';
  email.From := 'MY_NAME <OFFICE365_EMAIL_ADDRESS>';
  success := email.AddTo('John Doe','somebody@example.com');

  //  Call SendEmail to connect to the SMTP server and send.
  //  The connection (i.e. session) to the SMTP server remains
  //  open so that subsequent SendEmail calls may use the
  //  same connection.  
  success := mailman.SendEmail(email);
  if (success <> True) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  //  If SendEmail failed because of "Failed to get initial SMTP Response", then it may be 
  //  a firewall or anti-virus blocking communications.
  //  See https://cknotes.com/smtp-office365-com-failed-to-get-initial-smtp-response/

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

  WriteLn('Mail Sent!');


  jsonToken.Free;
  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.