NMPOP3 question

How can I know when I have received a new mail item to my exchange server via NMpop3 component? I can connect ok, I need some sort of a message to know when I received a new mail.

Thanks
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drnadeemAsked:
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DelRunnerCommented:
..sorry, I found an error in my sample code.
Here's the right one:

var
  Form1: TForm1;
  mails : Integer;

implementation

{$R *.dfm}


procedure TForm1.Button1Click(Sender: TObject);
begin
  NMPOP31.Connect;
  mails:=0;
  if NMPOP31.Connected then
  begin
    NMPOP31.List;
 end;
 if mails > StrToInt(Edit1.Text) then
   ShowMessage('You got new mail');
 Edit1.Text:=IntToStr(mails);
 NMPOP31.Disconnect;
end;

procedure TForm1.NMPOP31List(Msg, Size: Integer);
begin
  mails:=mails+1;
end;
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Phoenix_sCommented:
check the server every X minutes using a timer

I believe that's how most mail clients do it

it'll tell you if you have new mail
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DelRunnerCommented:
There ar several ways to check this, but a simple one is to store the number of messages in your mailbox everytime you connect, and then compare with the number of messages at the previous connection.
Edit1.Text holds the previous number of mails

procedure TForm1.Button1Click(Sender: TObject);
var
  mails : Integer;

begin
  NMPOP31.Connect;
  mails:=0;
  if NMPOP31.Connected then
  begin
    NMPOP31.List;
    mails:=mails+1;
  end;
  if mails > StrToInt(Edit1.Text) then
    ShowMessage('You got new mail');
  Edit1.Text:=IntToStr(mails);
  MNPOP31.Disconnect;
end;



The best way is the store and compare the MessageId's
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drnadeemAuthor Commented:
sorry for the late reply... but I as away on holidaying :)-
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