unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection,
  IdTCPClient, IdExplicitTLSClientServerBase, IdMessageClient, IdPOP3,
  IdIOHandler, IdIOHandlerSocket, IdIOHandlerStack, IdSSL, IdSSLOpenSSL;

type
  TForm1 = class(TForm)
    POP3: TIdPOP3;
    Button1: TButton;
    SSLHandler: TIdSSLIOHandlerSocketOpenSSL;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses
  IdMessage, IdText;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  lMsg: TIdMessage;
  liCount: Integer;
  liMessages: Integer;
begin
  POP3.Connect;
  liMessages := POP3.CheckMessages;
  Memo1.Lines.Add('CheckMessages: ' + IntToSTr(liMessages));
  lMsg := TIdMessage.Create;
  try
    POP3.Retrieve(1, lMsg);
    Memo1.Lines.Text := lMsg.MsgId;
    for liCount := 0 to lMsg.MessageParts.Count-1 do
      if lMsg.MessageParts[liCount] is TIdText then
        Memo1.Lines.AddStrings((lMsg.MessageParts[liCount] as TIdText).Body);
  finally
    lMsg.Free;
  end;
end;

end.

object Form1: TForm1
  Left = 192
  Top = 114
  Width = 696
  Height = 480
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 216
    Top = 16
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
  object Memo1: TMemo
    Left = 24
    Top = 56
    Width = 657
    Height = 185
    Lines.Strings = (
      'Memo1')
    TabOrder = 1
  end
  object POP3: TIdPOP3
    IOHandler = SSLHandler
    AutoLogin = True
    Host = 'pop.gmail.com'
    Username = 'YourName@gmail.com'
    UseTLS = utUseImplicitTLS
    Password = 'YourPassword'
    Port = 995
    SASLMechanisms = <>
    Left = 40
    Top = 16
  end
  object SSLHandler: TIdSSLIOHandlerSocketOpenSSL
    Destination = 'pop.gmail.com:995'
    Host = 'pop.gmail.com'
    MaxLineAction = maException
    Port = 995
    DefaultPort = 0
    SSLOptions.Method = sslvSSLv3
    SSLOptions.Mode = sslmUnassigned
    SSLOptions.VerifyMode = []
    SSLOptions.VerifyDepth = 0
    Left = 80
    Top = 16
  end
end