Retrieve UIDL's from POP3 Server

Retrieve a list of UIDLs from a POP3 server. A UIDL is an identifier consisting of 1 to 70 characters in the range 0x21 to 0x7E, which uniquely identifies a messages within a mailbox and persists across sessions.

Download Chilkat Email ActiveX for POP3 / SMTP

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATMAILLib2_TLB,
    CHILKATUTILLib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan2;
success: Integer;
sa: CHILKATUTILLib_TLB.ICkStringArray;
i: Integer;
n: Integer;

begin
//  The mailman object is used for receiving (POP3)
//  and sending (SMTP) email.
mailman := TChilkatMailMan2.Create(Self);

//  Any string argument automatically begins the 30-day trial.
success := mailman.UnlockComponent('30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Component unlock failed');

  end;

//  Set the POP3 server's hostname
mailman.MailHost := 'mail.chilkatsoft.com';

//  Set the POP3 login/password.
mailman.PopUsername := 'matt@chilkatsoft.com';
mailman.PopPassword := '****';

sa := mailman.GetUidls() as CHILKATUTILLib_TLB.ICkStringArray;

n := sa.Count;

for i := 0 to n - 1 do
  begin
    Memo1.Lines.Add(sa.GetString(i));
  end;


end;