(Delphi ActiveX) Delete Email Individually (One at a time) from an IMAP Mailbox

Downloads email from an IMAP mailbox and deletes emails individually (one by one).

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
imap: TChilkatImap;
success: Integer;
messageSet: IMessageSet;
fetchUids: Integer;
bundle: IChilkatEmailBundle;
i: Integer;
numEmails: Integer;
email: IChilkatEmail;

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

imap := TChilkatImap.Create(Self);

// Connect to an IMAP server.
// Use TLS
imap.Ssl := 1;
imap.Port := 993;
success := imap.Connect('imap.someMailServer.com');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Login
success := imap.Login('myLogin','myPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Select an IMAP mailbox
success := imap.SelectMailbox('Inbox');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// We can choose to fetch UIDs or sequence numbers.
fetchUids := 1;
// Get the message IDs of all the emails in the mailbox
messageSet := imap.Search('ALL',fetchUids);
if (imap.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Fetch the emails into a bundle object:

bundle := imap.FetchBundle(messageSet);
if (imap.LastMethodSuccess = 0) then
  begin

    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// To mark a complete set of emails for deletion, call SetFlags:
success := imap.SetFlags(messageSet,'Deleted',1);
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Messages can also be marked for deletion individually:
// Loop over the bundle and mark each message for deletion.
i := 0;
numEmails := bundle.MessageCount;
while i < numEmails do
  begin
    email := bundle.GetEmail(i);
    Memo1.Lines.Add(email.From);
    Memo1.Lines.Add(email.Subject);

    // To delete this email, set the "Deleted" flag to 1.
    // The email is not actually deleted until Expunge or
    // ExpungeAndClose is called.
    success := imap.SetMailFlag(email,'Deleted',1);
    if (success <> 1) then
      begin
        Memo1.Lines.Add(imap.LastErrorText);
        Exit;
      end;

    Memo1.Lines.Add('--');

    i := i + 1;
  end;

success := imap.ExpungeAndClose();
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);

    Exit;
  end;

// Disconnect from the IMAP server.
success := imap.Disconnect();
end;