Creating an SMTP Server - Conclusion
(Page 5 of 5 )
To test the server in Outlook Express enter "localhost" for both POP3/SMTP servers and use the username and passwords from the database's users table. Note that Outlook Express requires both an SMTP and POP3 server to be running prior to sending messages, so use the code from my previous POP3 Server tutorial to build a POP3 Server and run them both on your machine. Then start sending email messages! You can of course use these programs in a LAN environment or in a company as long as there's a network. I've included an empty MS Access database (available for download at the beginning of this article) for testing purposes.
The Entire Code
unit usmtps;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics,
Controls, Forms,
Dialogs, StdCtrls, IdIntercept, IdServerInterceptLogBase,
IdServerInterceptLogFile, DB, ADODB, IdBaseComponent,
IdComponent,
IdCustomTCPServer, IdTCPServer, IdCmdTCPServer,
IdExplicitTLSClientServerBase, IdSMTPServer,
IdMessage,idcontext,idsync,ActiveX;
type
// just some testrecord
TTestRec = record
IntField : integer;
CharField : char;
ByteField : byte;
StrField : string[20];
end;
PTTestRec = ^TTestRec;
TShowMessageSync = class(TIdSync)
protected
FMsg: TIdMessage;
public
procedure DoSynchronize; override;
constructor Create(tMsg: TIdMessage); reintroduce;
class procedure Show(tMsg: TIdMessage);
end;
TForm1 = class(TForm)
btnserveron: TButton;
btnserveroff: TButton;
IdSMTPServer1: TIdSMTPServer;
ado1: TADOTable;
q: TADOQuery;
ADOConnection1: TADOConnection;
LogFile: TIdServerInterceptLogFile;
mess: TIdMessage;
Label1: TLabel;
StaticText1: TStaticText;
StaticText2: TStaticText;
Label2: TLabel;
Label3: TLabel;
StaticText3: TStaticText;
Memo1: TMemo;
Label4: TLabel;
StaticText4: TStaticText;
procedure btnserveronClick(Sender: TObject);
procedure btnserveroffClick(Sender: TObject);
procedure IdSMTPServer1MsgReceive(ASender:
TIdSMTPServerContext;
AMsg: TStream; var LAction: TIdDataReply);
procedure IdSMTPServer1Connect(AContext: TIdContext);
procedure IdSMTPServer1RcptTo(ASender: TIdSMTPServerContext;
const AAddress: String; var VAction: TIdRCPToReply;
var VForward: String);
procedure IdSMTPServer1Received(ASender:
TIdSMTPServerContext;
var AReceived: String);
procedure IdSMTPServer1UserLogin(ASender:
TIdSMTPServerContext;
const AUsername, APassword: String; var VAuthenticated:
Boolean);
procedure IdSMTPServer1MailFrom(ASender:
TIdSMTPServerContext;
const AAddress: String; var VAction: TIdMailFromReply);
procedure FormCreate(Sender: TObject);
procedure IdSMTPServer1Execute(AContext: TIdContext);
procedure IdSMTPServer1Exception(AContext: TIdContext;
AException: Exception);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
constructor TShowMessageSync.Create(tMsg: TIdMessage);
begin
inherited Create;
FMsg := tMsg;
end;
procedure TShowMessageSync.DoSynchronize;
begin
Form1.Label2.Caption := FMsg.From.Address;
Form1.Label1.Caption := FMsg.Recipients.EMailAddresses;
Form1.Label3.Caption := FMsg.Subject;
Form1.Memo1.Lines.AddStrings(FMsg.Body);
end;
class procedure TShowMessageSync.Show(tMsg: TIdMessage);
begin
with Create(tMsg) do try
Synchronize;
finally
Free;
end;
end;
procedure TForm1.btnserveronClick(Sender: TObject);
begin
btnServerOn.Enabled := False;
btnServerOff.Enabled := True;
IdSMTPServer1.active := true;
end;
procedure TForm1.btnserveroffClick(Sender: TObject);
begin
btnServerOn.Enabled := True;
btnServerOff.Enabled := False;
IdSMTPServer1.active := false;
end;
procedure TForm1.IdSMTPServer1MsgReceive(ASender:
TIdSMTPServerContext;
AMsg: TStream; var LAction: TIdDataReply);
var
lmsg : TIdMessage;
LStream : TFileStream;
toad,from,sub,body:string;
abuff:tstrings;
six:int64;
begin
CoInitialize(nil);
six:=amsg.Size;
LStream := TFileStream.Create(ExtractFilePath
(Application.exename) + 'test.eml', fmCreate);
Try
LStream.CopyFrom(AMsg, 0);
Finally
FreeAndNil(LStream);
End;
mess.NoDecode:=true;
mess.LoadFromFile('test.eml',false);
label4.Caption:=datetostr(mess.Date);
label1.Caption:=mess.Recipients.EMailAddresses;
label2.Caption:=mess.From.Address;
label3.Caption:=mess.Subject;
memo1.Lines.Text:=mess.Body.Text;
//if mess.From.Address <> '' then begin
ado1.TableName:='email';
ado1.Active:=true;
ado1.Insert;
ado1.FieldByName('to').Text:=mess.Recipients.EMailAddresses;
ado1.FieldByName('from').Text:= mess.From.Address;
ado1.FieldByName('subject').Text:=mess.Subject;
ado1.FieldByName('mbody').AsString:=mess.Body.Text;
//Date: Wed, 1 Feb 2006 17:34:43 +0000
ado1.FieldByName('mdate').AsDateTime:=mess.Date;
ado1.FieldByName('msize').value:=six;
ado1.FieldByName('ismarked').value:=0;
ado1.Post;
CoUnInitialize;
//end;
end;
procedure TForm1.IdSMTPServer1Connect(AContext: TIdContext);
begin
//idsmtpserver1.Greeting.SetReply(220,'Welcome to Leidago
Server');
//logfile.Accept(acontext.Connection);
end;
procedure TForm1.IdSMTPServer1RcptTo(ASender:
TIdSMTPServerContext;
const AAddress: String; var VAction: TIdRCPToReply;
var VForward: String);
begin
// The following actions can be returned to the server:
{
rAddressOk, //address is okay
rRelayDenied, //we do not relay for third-parties
rInvalid, //invalid address
rWillForward, //not local - we will forward
rNoForward, //not local - will not forward - please use
rTooManyAddresses, //too many addresses
rDisabledPerm, //disabled permanently - not accepting E-Mail
rDisabledTemp //disabled temporarily - not accepting E-Mail
}
if Pos('@', AAddress) > 0 then begin
VAction := rAddressOk;
end
else begin
VAction :=rInvalid;
end;
end;
procedure TForm1.IdSMTPServer1Received(ASender:
TIdSMTPServerContext;
var AReceived: String);
begin
// This is a new event in the rewrite of IdSMTPServer for Indy
10.
// It lets you control the Received: header that is added to the
e-mail.
// If you do not want a Received here to be added, set
AReceived := '';
// Formatting 'keys' are available in the received header --
please check
// the IdSMTPServer source for more detail.
AReceived := '';
end;
procedure TForm1.IdSMTPServer1UserLogin(ASender:
TIdSMTPServerContext;
const AUsername, APassword: String; var VAuthenticated:
Boolean);
begin
// This event is fired if a user attempts to login to the server
// Normally used to grant relay access to specific users etc.
//Search for the username and password in "users" table..
q2.SQL.Text := 'SELECT * from users WHERE uname=:user AND
upass=:pwd';
q2.Parameters.ParamByName('user').Value :=AUsername;
q2.Parameters.ParamByName('pwd').Value := APassword;
q2.open;
//if the user is not found, set authentication to false
if q2.RecordCount = 0 then begin
VAuthenticated := False;
end else begin
VAuthenticated := True;
end;
end;
procedure TForm1.IdSMTPServer1MailFrom(ASender: TIdSMTPServerContext;
const AAddress: String; var VAction: TIdMailFromReply);
begin
// Here we are testing the MAIL FROM line sent to the server.
// MAIL FROM address comes in via AAddress. VAction sets the
return action to the //server.
// The following actions can be returned to the server:
{ mAccept, mReject }
if Pos('@', AAddress) > 0 then begin
VAction:= mAccept;
end
else begin
VAction := mReject;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
idsmtpserver1.Greeting.SetReply(220,'Welcome to SMTP Server');
end;
procedure TForm1.IdSMTPServer1Execute(AContext: TIdContext);
begin
logfile.DoLogWriteString(acontext.Connection.IOHandler.ReadLn);
end;
procedure TForm1.IdSMTPServer1Exception(AContext: TIdContext;
AException: Exception);
begin
acontext.Connection.IOHandler.Write(aexception.Message);
end;
end.
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