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). Delphi 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
success: Boolean;
imap: HCkImap;
fetchUids: Boolean;
messageSet: HCkMessageSet;
bundle: HCkEmailBundle;
headersOnly: Boolean;
email: HCkEmail;
i: Integer;
numEmails: Integer;

begin
success := False;

// 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.example.com');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

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

// Select an IMAP mailbox
success := CkImap_SelectMailbox(imap,'Inbox');
if (success = False) 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 := CkMessageSet_Create();
success := CkImap_QueryMbx(imap,'ALL',fetchUids,messageSet);
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Fetch the emails into a bundle object:
bundle := CkEmailBundle_Create();
headersOnly := False;
success := CkImap_FetchMsgSet(imap,headersOnly,messageSet,bundle);
if (success = False) then
  begin
    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 = False) 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.
email := CkEmail_Create();
i := 0;
numEmails := CkEmailBundle_getMessageCount(bundle);
while i < numEmails do
  begin
    CkEmailBundle_EmailAt(bundle,i,email);

    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 = False) then
      begin
        Memo1.Lines.Add(CkImap__lastErrorText(imap));
        Exit;
      end;

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

    i := i + 1;
  end;

success := CkImap_ExpungeAndClose(imap);
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

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

CkImap_Dispose(imap);
CkMessageSet_Dispose(messageSet);
CkEmailBundle_Dispose(bundle);
CkEmail_Dispose(email);

end;