title: SendEmail with Indy components
body: <p>I try to send an email, but I have a problem, however, I found this code on the web:</p>
  
  <pre><code>Uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdMessage, IdTCPConnection, IdTCPClient,
  IdMessageClient, IdSMTP, IdBaseComponent, IdComponent, IdIOHandler,
  IdExplicitTLSClientServerBase, IdSMTPBase
  
  procedure SendSimpleMail;
  var
  Msg: TIdMessage;
  DestAddr: TIdEmailAddressItem;
  begin
  Msg := TIdMessage.Create(Self); //error here
  Msg.From.Text := 'name';
  Msg.From.Address := 'username@gmail.com';
  Msg.Subject := 'Test';
  
  DestAddr := Msg.Recipients.Add;
  DestAddr.Text := 'name';
  DestAddr.Address := 'username@yahoo.com';
  Msg.Body.Add('simple test mail.');
  
  tIdSMTP.Host := 'smtp.gmail.com';
  tIdSMTP.Port := 25;
  tIdSMTP.AuthenticationType := atLogin; //error here (2 error)
  tIdSMTP.Username := 'username@gmail.com';
  tIdSMTP.Password := 'password';
  tIdSMTP.Connect;
  tIdSMTP.Authenticate;
  tIdSMTP.Send(Msg);
  tIdSMTP.Disconnect;
  end;
  </code></pre>
  
  <p>But however, I noted many mistakes and I am missing a component of Indy.
  Compiler errors:</p>
  
  <pre><code>[DCC Error] Unit1.pas(36): E2003 Undeclared identifier: 'Self'
  [DCC Error] Unit1.pas(46): E2233 Property 'Host' inaccessible here
  [DCC Error] Unit1.pas(47): E2233 Property 'Port' inaccessible here
  [DCC Error] Unit1.pas(48): E2003 Undeclared identifier: 'AuthenticationType'
  [DCC Error] Unit1.pas(48): E2003 Undeclared identifier: 'atLogin'
  [DCC Error] Unit1.pas(49): E2233 Property 'Username' inaccessible here
  [DCC Error] Unit1.pas(50): E2233 Property 'Password' inaccessible here
  [DCC Error] Unit1.pas(51): E2076 This form of method call only allowed for class methods
  [DCC Error] Unit1.pas(52): E2076 This form of method call only allowed for class methods
  [DCC Error] Unit1.pas(53): E2076 This form of method call only allowed for class methods
  [DCC Error] Unit1.pas(54): E2076 This form of method call only allowed for class methods
  [DCC Error] Project1.dpr(5): F2063 Could not compile used unit 'Unit1.pas'
  </code></pre>
  
  <p>Thanks for the help in advance</p>