Delphi DLL

POP3 using HTTP Proxy

Demonstrates how to communicate with a POP3 server through an HTTP proxy. 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();

// To connect through an HTTP proxy, set the HttpProxyHostname
// and HttpProxyPort properties to the hostname (or IP address)
// and port of the HTTP proxy.  Typical port numbers used by
// HTTP proxy servers are 3128 and 8080.
CkMailMan_putHttpProxyHostname(mailman,'www.my-http-proxy.com');
CkMailMan_putHttpProxyPort(mailman,3128);

// Important:  Your HTTP proxy server must allow non-HTTP
// traffic to pass.  Otherwise this does not work.

// 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');

// Copy the all email from the user's POP3 mailbox 
// into a bundle object.  The email remains on the server.
// 
// NOTE: All methods that communicate with a POP3 server
// will automatically connect and authenticate (i.e. login)
// if not already connected.  The connection will remain
// open after the method call returns so that subsequent
// calls do not need to re-establish the connection.
// In this case, the connection is established via the HTTP
// proxy.
bundle := CkEmailBundle_Create();
keepOnServer := True;
headersOnly := False;
// Irrelevent because we are not downloading headers-only
numBodyLines := 0;
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));
    i := i + 1;
  end;

success := CkMailMan_Pop3EndSession(mailman);

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

end;