(Delphi ActiveX) Retrieve UIDL's from POP3 Server

Retrieve a list of UIDLs from a POP3 server. UIDLs are unique identifiers, 1 to 70 characters long, composed of characters ranging from 0x21 to 0x7E. These identifiers uniquely distinguish messages within a mailbox and remain consistent across sessions.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
mailman: TChilkatMailMan;
stUidls: TChilkatStringTable;
email: TChilkatEmail;
count: Integer;
i: Integer;
uidl: WideString;

begin
success := 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

mailman := TChilkatMailMan.Create(Self);

mailman.MailHost := 'pop.example.com';

mailman.PopUsername := 'myLogin';
mailman.PopPassword := 'myPassword';

mailman.MailPort := 995;
mailman.PopSsl := 1;

stUidls := TChilkatStringTable.Create(Self);
success := mailman.FetchUidls(stUidls.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

// Download each email by UIDL.
email := TChilkatEmail.Create(Self);

count := stUidls.Count;
i := 0;
while i < count do
  begin
    // Download the full email.
    uidl := stUidls.StringAt(i);
    success := mailman.FetchByUidl(uidl,0,0,email.ControlInterface);
    if (success = 0) then
      begin
        Memo1.Lines.Add(mailman.LastErrorText);
        Exit;
      end;

    Memo1.Lines.Add(IntToStr(i));
    Memo1.Lines.Add('UIDL: ' + uidl);
    Memo1.Lines.Add('From: ' + email.From);
    Memo1.Lines.Add('Subject: ' + email.Subject);

    i := i + 1;
  end;

mailman.Pop3EndSession();
end;