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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, EmailBundle, Imap, Email, MessageSet;

...

procedure TForm1.Button1Click(Sender: TObject);
var
imap: HCkImap;
success: Boolean;
messageSet: HCkMessageSet;
fetchUids: Boolean;
bundle: HCkEmailBundle;
i: Integer;
numEmails: Integer;
email: HCkEmail;

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

imap := CkImap_Create();

// Connect to an IMAP server.
// Use TLS
CkImap_putSsl(imap,True);
CkImap_putPort(imap,993);
success := CkImap_Connect(imap,'imap.someMailServer.com');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

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

// Select an IMAP mailbox
success := CkImap_SelectMailbox(imap,'Inbox');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// We can choose to fetch UIDs or sequence numbers.
fetchUids := True;
// Get the message IDs of all the emails in the mailbox
messageSet := CkImap_Search(imap,'ALL',fetchUids);
if (CkImap_getLastMethodSuccess(imap) = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Fetch the emails into a bundle object:

bundle := CkImap_FetchBundle(imap,messageSet);
if (CkImap_getLastMethodSuccess(imap) = False) then
  begin
    CkMessageSet_Dispose(messageSet);
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

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

// Messages can also be marked for deletion individually:
// Loop over the bundle and mark each message for deletion.
i := 0;
numEmails := CkEmailBundle_getMessageCount(bundle);
while i < numEmails do
  begin
    email := CkEmailBundle_GetEmail(bundle,i);
    Memo1.Lines.Add(CkEmail__from(email));
    Memo1.Lines.Add(CkEmail__subject(email));

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

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

    i := i + 1;
  end;

success := CkImap_ExpungeAndClose(imap);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    CkMessageSet_Dispose(messageSet);
    CkEmailBundle_Dispose(bundle);
    Exit;
  end;

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

CkMessageSet_Dispose(messageSet);
CkEmailBundle_Dispose(bundle);

CkImap_Dispose(imap);

end;