(Delphi ActiveX) SMTP XOAUTH2 Authentication

Demonstrates how to authenticate using an OAuth2 access token. This example assumes you have already obtained the access token and now wish to use it in an SMTP session.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
oauth2_access_token: WideString;
mailman: TChilkatMailMan;
email: TChilkatEmail;

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

oauth2_access_token := 'some_previously_obtained_token';

mailman := TChilkatMailMan.Create(Self);

// Set the properties for the SMTP server, whatever they may be..
mailman.SmtpHost := 'smtp.example.com';
mailman.SmtpPort := 587;
mailman.StartTLS := 1;

mailman.SmtpUsername := 'myLogin';
mailman.OAuth2AccessToken := oauth2_access_token;

// Create a new email object
email := TChilkatEmail.Create(Self);

email.Subject := 'This is a test';
email.Body := 'This is a test';
email.From := 'Joe Example <joe@example.com>';
email.AddTo('Chilkat Admin','admin@chilkatsoft.com');

// Connect to the server indicated by the SmtpHost property
success := mailman.SmtpConnect();
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

// Authenticate using XOAUTH2 (using the OAuth2AccessToken)
success := mailman.SmtpAuthenticate();
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

success := mailman.SendEmail(email.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Email sent.');

mailman.CloseSmtpConnection();
end;