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开发平台：
Delphi

SMTPDEM.PAS：源码内容
							unit smtpdem;
interface
uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ComCtrls, StdCtrls, Psock, NMsmtp, ExtCtrls;
type
  TForm1 = class(TForm)
    PageControl1: TPageControl;
    TabSheet1: TTabSheet;
    TabSheet2: TTabSheet;
    TabSheet3: TTabSheet;
    Edit1: TEdit;
    NMSMTP1: TNMSMTP;
    Label1: TLabel;
    Edit2: TEdit;
    Label2: TLabel;
    Button1: TButton;
    Button2: TButton;
    TabSheet4: TTabSheet;
    StatusBar1: TStatusBar;
    Edit10: TEdit;
    Label11: TLabel;
    Button6: TButton;
    Edit3: TEdit;
    Label3: TLabel;
    Memo1: TMemo;
    Panel1: TPanel;
    GroupBox1: TGroupBox;
    Edit4: TEdit;
    Edit5: TEdit;
    Label4: TLabel;
    Label5: TLabel;
    Edit6: TEdit;
    Label6: TLabel;
    Edit7: TEdit;
    Label7: TLabel;
    Edit8: TEdit;
    Label8: TLabel;
    ListBox1: TListBox;
    Label9: TLabel;
    Button3: TButton;
    Button4: TButton;
    Memo2: TMemo;
    Panel2: TPanel;
    Button5: TButton;
    Label10: TLabel;
    Panel3: TPanel;
    Label13: TLabel;
    Button7: TButton;
    Label12: TLabel;
    OpenDialog1: TOpenDialog;
    Edit9: TEdit;
    Edit11: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure NMSMTP1Connect(Sender: TObject);
    procedure NMSMTP1Disconnect(Sender: TObject);
    procedure NMSMTP1Status(Sender: TComponent; Status: String);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure NMSMTP1EncodeStart(Filename: String);
    procedure NMSMTP1EncodeEnd(Filename: String);
    procedure Button7Click(Sender: TObject);
    procedure NMSMTP1MailListReturn(MailAddress: String);
    procedure NMSMTP1ConnectionFailed(Sender: TObject);
    procedure NMSMTP1ConnectionRequired(var handled: Boolean);
    procedure NMSMTP1Failure(Sender: TObject);
    procedure NMSMTP1HostResolved(Sender: TComponent);
    procedure NMSMTP1InvalidHost(var handled: Boolean);
    procedure NMSMTP1PacketSent(Sender: TObject);
    procedure NMSMTP1RecipientNotFound(Recipient: String);
    procedure NMSMTP1SendStart(Sender: TObject);
    procedure NMSMTP1Success(Sender: TObject);
    procedure NMSMTP1HeaderIncomplete(var handled: Boolean;
      hiType: Integer);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
begin
  NMSMTP1.Host := Edit1.Text;
  NMSMTP1.Port := StrToInt(Edit2.Text);
  NMSMTP1.UserID := Edit4.Text;
  NMSMTP1.Connect;
end;
procedure TForm1.Button6Click(Sender: TObject);
var
  TmpStr: String;
begin
  TmpStr := Edit3.Text; // 为了不让用户修改编辑框的内容
  If NMSMTP1.Verify(TmpStr) then
    ShowMessage(TmpStr+'已经验证。')
  else
    ShowMessage(TmpStr+'没有被验证。');
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
  NMSMTP1.Disconnect;
end;
procedure TForm1.NMSMTP1Connect(Sender: TObject);
begin
  StatusBar1.SimpleText := '已经连接。';
end;
procedure TForm1.NMSMTP1Disconnect(Sender: TObject);
begin
  If StatusBar1 <> nil then
    StatusBar1.SimpleText := '断开连接。';
end;
procedure TForm1.NMSMTP1Status(Sender: TComponent; Status: String);
begin
  If StatusBar1 <> nil then
    StatusBar1.SimpleText := status;
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
  If OpenDialog1.Execute then
    ListBox1.Items.Add(OpenDialog1.FileName);
end;
procedure TForm1.Button4Click(Sender: TObject);
begin
  ListBox1.Items.Delete(ListBox1.ItemIndex);
end;
procedure TForm1.Button5Click(Sender: TObject);
begin
  NMSMTP1.PostMessage.FromAddress := Edit6.Text;
  NMSMTP1.PostMessage.FromName := Edit5.Text;
  NMSMTP1.PostMessage.Subject := Edit10.Text;
  NMSMTP1.PostMessage.ToAddress.Add(Edit7.Text);
  NMSMTP1.PostMessage.ToBlindCarbonCopy.Add(Edit9.Text);
  NMSMTP1.PostMessage.ToCarbonCopy.Add(Edit8.Text);
  NMSMTP1.PostMessage.Attachments.AddStrings(Listbox1.Items);
  NMSMTP1.PostMessage.Body.Assign(Memo1.Lines);
  NMSMTP1.SendMail;
end;
procedure TForm1.NMSMTP1EncodeStart(Filename: String);
begin
  StatusBar1.SimpleText := '编码'+Filename;
end;
procedure TForm1.NMSMTP1EncodeEnd(Filename: String);
begin
  StatusBar1.SimpleText := '结束编码'+Filename;
end;
procedure TForm1.Button7Click(Sender: TObject);
begin
  NMSMTP1.ExpandList(Edit11.Text);
end;
procedure TForm1.NMSMTP1MailListReturn(MailAddress: String);
begin
  Memo2.Lines.Add(MailAddress);
end;
procedure TForm1.NMSMTP1ConnectionFailed(Sender: TObject);
begin
  ShowMessage('连接失败。');
end;
procedure TForm1.NMSMTP1ConnectionRequired(var handled: Boolean);
begin
  If MessageDlg('需要连接，进行连接吗?', mtConfirmation, mbOkCancel, 0) = mrOk then
  Begin
    Handled := TRUE;
    NMSMTP1.Connect;
  End;
end;
procedure TForm1.NMSMTP1Failure(Sender: TObject);
begin
  StatusBar1.SimpleText := '失败。';
end;
procedure TForm1.NMSMTP1HostResolved(Sender: TComponent);
begin
  StatusBar1.SimpleText := '解析主机。';
end;
procedure TForm1.NMSMTP1InvalidHost(var handled: Boolean);
var
  TmpStr: String;
begin
  If InputQuery('无效主机!', '指定一台新的主机:', TmpStr) then
  Begin
    NMSMTP1.Host := TmpStr;
    Handled := TRUE;
  End;
end;
procedure TForm1.NMSMTP1PacketSent(Sender: TObject);
begin
  StatusBar1.SimpleText := IntToStr(NMSMTP1.BytesTotal)+'中的'+IntToStr(NMSMTP1.BytesSent)+'字节数被发送。';
end;
procedure TForm1.NMSMTP1RecipientNotFound(Recipient: String);
begin
  ShowMessage('没有发现容器"'+Recipient+'"');
end;
procedure TForm1.NMSMTP1SendStart(Sender: TObject);
begin
  StatusBar1.simpleText := '正在发送消息';
end;
procedure TForm1.NMSMTP1Success(Sender: TObject);
begin
  StatusBar1.SimpleText := '成功';
end;
procedure TForm1.NMSMTP1HeaderIncomplete(var handled: Boolean;
  hiType: Integer);
begin
  ShowMessage('信息头没有完成.');
end;                               
procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
 NMSMTP1.Abort;
end;
end.

						