Пример работы с SMTP

unit Unit1;
 
interface
 
uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ExtCtrls, ComCtrls, Psock, NMsmtp;
 

 
type
TForm1 = class(TForm)
  Memo: TRichEdit;
  Panel1: TPanel;
  SMTP: TNMSMTP;
  Panel2: TPanel;
  FromAddress: TEdit;
  predefined: TLabel;
  FromName: TEdit;
  Subject: TEdit;
  LocalProgram: TEdit;
  ReplyTo: TEdit;
  islog: TCheckBox;
  Host: TEdit;
  Port: TEdit;
  userid: TEdit;
  Button1: TButton;
  procedure Button1Click(Sender: TObject);
private
  Procedure CleanContext;
  procedure PerformConnection;
  procedure AddMessage(msg:string; color:integer);
  procedure log(inpt :string);
  Procedure SetSMTP;
public
  function SendEmail(_to, cc, bcc, Subject, body, attachment:string; HTMLFormat:boolean):boolean;
end;
 
var Form1: TForm1;
 
implementation
{$R *.DFM}
 
Procedure TForm1.SetSMTP;
begin
SMTP.Host:=Host.Text;
SMTP.Port:=strtoint(Port.text);
SMTP.UserID:=userid.text;
end;
 
Function GetEmailDateTime:string;
var tz:_time_Zone_information;
    s:string;
begin
GetTimeZoneInformation(tz);
if (tz.Bias*100 div 60)<1000 then
  s:=format(' -0%d',[tz.Bias*100 div 60])
else
  s:=format(' -%d',[tz.Bias*100 div 60]);
result:=formatdatetime('ddd, dd mmm yyyy hh:nn:ss',now)+s;
end;
 
Procedure TForm1.CleanContext;
{set default values, some of them comes from "Setup" form}
begin
SMTP.PostMessage.FromAddress:=FromAddress.text;
SMTP.PostMessage.FromName:=FromName.text;
SMTP.PostMessage.ToAddress.Clear;
SMTP.PostMessage.ToCarbonCopy.clear;
SMTP.PostMessage.ToBlindCarbonCopy.clear;
SMTP.PostMessage.Body.clear;
SMTP.PostMessage.Attachments.clear;
SMTP.PostMessage.Subject:=Subject.text;
SMTP.PostMessage.LocalProgram:=LocalProgram.text;
(*Mon, 27 Nov 2000 12:37:46 -0700*)
SMTP.PostMessage.Date:=GetEmailDateTime;
SMTP.PostMessage.ReplyTo:=ReplyTo.Text;
end;
 
procedure TForm1.log(inpt :string);
  var outf:textfile;
begin  {writing in the log file}
if not islog.checked then exit;
assignfile(outf, changefileext(paramstr(0), '.log'));
if fileexists(changefileext(paramstr(0), '.log')) then
  append(outf)
else
  rewrite(outf);
writeln(outf, datetimetostr(now)+'|'+inpt);
closefile(outf);
end;
 
procedure TForm1.AddMessage(msg:string; color:integer);
begin {showing in the memo field progress...}
while memo.lines.Count>2000 do memo.lines.Delete(0);
memo.sellength:=0;
memo.selstart:=length(memo.text);
memo.selattributes.Color:=Color;
memo.seltext:=#13#10+DateTimeTostr(now)+' '+msg;
memo.perform($00B7,0,0);
Application.ProcessMessages;
if color<>clRed then log(DateTimeTostr(now)+' '+msg) else log('Error: '+DateTimeTostr(now)+' '+msg);
end;
 
procedure TForm1.PerformConnection;
begin
while (not SMTP.connected) do
  begin
    SetSMTP;
    AddMessage('Connecting to SMTP',clBlue);
    application.processmessages;
    try
      SMTP.Connect;
      AddMessage('No Errors',clBlue);
    except
      on e:exception do AddMessage('Error conection: '+e.message,clBlue);
    end;
  end;
end;
 
Function TForm1.SendEmail(_to, cc, bcc, Subject, body,  attachment:string; HTMLFormat:boolean):boolean;
begin
PerformConnection;
result:=true;
CleanContext;
try
  if (attachment<>'') and (not Fileexists(attachment)) then
    begin
      AddMessage('Attachment is not ready yet ('+ attachment+') ', clNavy);
      sleep(300);
      result:=false;
      exit;
    end;
  SMTP.PostMessage.ToAddress.text:=StringReplace(_to, ';',#13#10, [rfReplaceAll, rfIgnoreCase]);
  if cc<>'' then SMTP.PostMessage.ToCarbonCopy.text:=StringReplace(cc, ';',#13#10, [rfReplaceAll, rfIgnoreCase]);
  if bcc<>'' then SMTP.PostMessage.ToBlindCarbonCopy.text:=StringReplace(bcc, ';',#13#10, [rfReplaceAll, rfIgnoreCase]);
  if Subject<>'' then SMTP.PostMessage.Subject:=Subject;
  if HTMLFormat then SMTP.SubType:=mtPlain else SMTP.SubType:=mtHtml;
  SMTP.PostMessage.Body.Text:=Body;
  if attachment<>'' then SMTP.PostMessage.Attachments.add(attachment);
  AddMessage('Sending to '+ _to, clGreen);
  SMTP.SendMail;
  AddMessage('Complete.'+#13#10, clGreen);
except
  on e:sysutils.exception do
    begin
      AddMessage(e.message, clRed);
      result:=false;
    end;
end;
end;
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  SendEmail('somewhere@somedomain.ru', '', '', 'test', 'body',  '', False);
end;
 
end.

А это форма для этого примера:

object Form1: TForm1
Left = 278
Top = 108
Width = 539
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 Memo: TRichEdit
Left = 0
Top = 0
Width = 346
Height = 420
Align = alClient
Lines.Strings = ('Memo')
TabOrder = 0
end
object Panel1: TPanel
Left = 0
Top = 420
Width = 531
Height = 33
Align = alBottom
Caption = 'Panel1'
TabOrder = 1
object Button1: TButton
Left = 440
Top = 8
Width = 75
Height = 25
Caption = 'Button1'
TabOrder = 0
OnClick = Button1Click
end
end
object Panel2: TPanel
Left = 346
Top = 0
Width = 185
Height = 420
Align = alRight
Caption = 'Panel2'
TabOrder = 2
object predefined: TLabel
Left = 8
Top = 8
Width = 87
Height = 13
Caption = 'predefined values:'
end
object FromAddress: TEdit
Left = 24
Top = 32
Width = 121
Height = 21
TabOrder = 0
Text = 'FromAddress'
end
object FromName: TEdit
Left = 24
Top = 56
Width = 121
Height = 21
TabOrder = 1
Text = 'FromName'
end
object Subject: TEdit
Left = 24
Top = 80
Width = 121
Height = 21
TabOrder = 2
Text = 'Subject'
end
object LocalProgram: TEdit
Left = 24
Top = 104
Width = 121
Height = 21
TabOrder = 3
Text = 'LocalProgram'
end
object ReplyTo: TEdit
Left = 24
Top = 128
Width = 121
Height = 21
TabOrder = 4
Text = 'ReplyTo'
end
object islog: TCheckBox
Left = 32
Top = 168
Width = 97
Height = 17
Caption = 'islog'
TabOrder = 5
end
object Host: TEdit
Left = 24
Top = 240
Width = 121
Height = 21
TabOrder = 6
Text = 'Host'
end
object Port: TEdit
Left = 24
Top = 264
Width = 121
Height = 21
TabOrder = 7
Text = 'Port'
end
object userid: TEdit
Left = 24
Top = 288
Width = 121
Height = 21
TabOrder = 8
Text = 'userid'
end
end
object SMTP: TNMSMTP
Port = 25
ReportLevel = 0
EncodeType = uuMime
ClearParams = True
SubType = mtPlain
Charset = 'us-ascii'
Left = 296
Top = 32
end
end 

Автор: Vit

Взято с Vingrad.ru https://forum.vingrad.ru

В следующем примере E-mail отправляется автоматически сразу после нажатия кнопки.

ЗАМЕЧАНИЕ: Вам потребуется компонент 'TNMSMTP'. Этот компонент входит в поставляется с Delphi 4 и 5 и его можно найти на закладке 'Fastnet'.

procedure TForm1.Button1Click(Sender: TObject); 
begin 
NMSMTP1.Host := 'smtp.mailserver.com'; 
NMSMTP1.UserID := 'h.abdullah'; 
NMSMTP1.Connect; 
NMSMTP1.PostMessage.FromAddress := 'hasan@excite.com'; 
NMSMTP1.PostMessage.ToAddress.Text := 'someone@xmail.com'; 
NMSMTP1.PostMessage.Body.Text := 'Текст письма';
NMSMTP1.PostMessage.Subject := 'Тема письма';
NMSMTP1.SendMail; 
end;

Взято из https://forum.sources.ru