Delphi DLL

Delete Individual Emails from POP3 Mailbox

Demonstrates how to delete individual emails from a POP3 mailbox. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
mailman: HCkMailMan;
bundle: HCkEmailBundle;
keepOnServer: Boolean;
headersOnly: Boolean;
numBodyLines: Integer;
email: HCkEmail;
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 := CkMailMan_Create();

// Set the POP3 server's hostname
CkMailMan_putMailHost(mailman,'pop.example.com');

// Set the POP3 login/password.
CkMailMan_putPopUsername(mailman,'myLogin');
CkMailMan_putPopPassword(mailman,'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.
CkMailMan_putImmediateDelete(mailman,False);

// Download email headers.  
bundle := CkEmailBundle_Create();
keepOnServer := True;
headersOnly := True;
numBodyLines := 1;
success := CkMailMan_FetchAll(mailman,keepOnServer,headersOnly,numBodyLines,bundle);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

email := CkEmail_Create();
i := 0;
while i < CkEmailBundle_getMessageCount(bundle) do
  begin
    CkEmailBundle_EmailAt(bundle,i,email);

    Memo1.Lines.Add('From: ' + CkEmail__from(email));
    Memo1.Lines.Add('Subject: ' + CkEmail__subject(email));

    // If you decide the email is to be deleted, call DeleteEmail.
    // This marks the email for deletion on the POP3 server.
    success := CkMailMan_DeleteEmail(mailman,email);
    if (success = False) then
      begin
        Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
        Exit;
      end;

    i := i + 1;
  end;

// Make sure the POP3 session is ended to finalize the deletes.
success := CkMailMan_Pop3EndSession(mailman);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

Memo1.Lines.Add('Success!');

CkMailMan_Dispose(mailman);
CkEmailBundle_Dispose(bundle);
CkEmail_Dispose(email);

end;