Pascal (Lazarus/Delphi)

Delete Individual Emails from POP3 Mailbox

Demonstrates how to delete individual emails from a POP3 mailbox. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.MailMan,
  Chilkat.EmailBundle,
  Chilkat.Email;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  bundle: TEmailBundle;
  keepOnServer: Boolean;
  headersOnly: Boolean;
  numBodyLines: Integer;
  email: TEmail;
  i: Integer;

begin
  success := False;

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

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

  //  Set the POP3 server's hostname
  mailman.MailHost := 'pop.example.com';

  //  Set the POP3 login/password.
  mailman.PopUsername := 'myLogin';
  mailman.PopPassword := 'myPassword';

  //  Set the ImmediateDelete property = False
  //  When the DeleteEmail method is called, the POP3 session
  //  will remain open and the emails will be deleted all at once
  //  when the session closes.
  mailman.ImmediateDelete := False;

  //  Download email headers.  
  bundle := TEmailBundle.Create;
  keepOnServer := True;
  headersOnly := True;
  numBodyLines := 1;
  success := mailman.FetchAll(keepOnServer,headersOnly,numBodyLines,bundle);
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  email := TEmail.Create;
  i := 0;
  while i < bundle.MessageCount do
    begin
      bundle.EmailAt(i,email);

      WriteLn('From: ' + email.From);
      WriteLn('Subject: ' + email.Subject);

      //  If you decide the email is to be deleted, call DeleteEmail.
      //  This marks the email for deletion on the POP3 server.
      success := mailman.DeleteEmail(email);
      if (success = False) then
        begin
          WriteLn(mailman.LastErrorText);
          Exit;
        end;

      i := i + 1;
    end;

  //  Make sure the POP3 session is ended to finalize the deletes.
  success := mailman.Pop3EndSession();
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  WriteLn('Success!');


  mailman.Free;
  bundle.Free;
  email.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.