SMTP using SOCKS5, SOCKS4 Proxy

Demonstrates how to communicate with an SMTP server via a SOCKS4 or SOCKS5 proxy.

Download Chilkat Email ActiveX

Download Chilkat IMAP ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATMAILLib2_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan2;
success: Integer;
email: CHILKATMAILLib2_TLB.IChilkatEmail2;

begin
//  The mailman object is used for sending and receiving email.
mailman := TChilkatMailMan2.Create(Self);

//  Any string argument automatically begins the 30-day trial.
success := mailman.UnlockComponent('30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Component unlock failed');
    Exit;
  end;

//  To use a SOCKS4 or SOCKS5 proxy, simply set the following
//  properties prior to making any calls that communicate with
//  an SMTP server:
//  The SOCKS hostname may be a domain name or
//  IP address:
mailman.SocksHostname := 'www.mysocksproxyserver.com';
mailman.SocksPort := 1080;
mailman.SocksUsername := 'myProxyLogin';
mailman.SocksPassword := 'myProxyPassword';
//  Set the SOCKS version to 4 or 5 based on the version
//  of the SOCKS proxy server:
mailman.SocksVersion := 5;
//  Note: SOCKS4 servers only support usernames without passwords.
//  SOCKS5 servers support full login/password authentication.

//  Set the SMTP server.
mailman.SmtpHost := 'smtp.chilkatsoft.com';

//  Set the SMTP login/password (if required)
mailman.SmtpUsername := 'myUsername';
mailman.SmtpPassword := 'myPassword';

//  Create a new email object
email := CoChilkatEmail2.Create();

email.Subject := 'This is a test';
email.Body := 'This is a test';
email.From := 'Chilkat Support <support@chilkatsoft.com>';
email.AddTo('Chilkat Admin','admin@chilkatsoft.com');

//  Call SendEmail to connect to the SMTP server and send.
//  The connection (i.e. session) to the SMTP server remains
//  open so that subsequent SendEmail calls may use the
//  same connection.
success := mailman.SendEmail(email As CHILKATMAILLib2_TLB.IChilkatEmail2);
if (success <> 1) then
  begin
    ShowMessage(mailman.LastErrorText);
    Exit;
  end;

//  Some SMTP servers do not actually send the email until
//  the connection is closed.  In these cases, it is necessary to
//  call CloseSmtpConnection for the mail to be  sent.
//  Most SMTP servers send the email immediately, and it is
//  not required to close the connection.  We'll close it here
//  for the example:
success := mailman.CloseSmtpConnection();
if (success <> 1) then
  begin
    ShowMessage('Connection to SMTP server not closed cleanly.');
  end;

ShowMessage('Mail Sent!');
end;