(Delphi ActiveX) Send High Priority Email (SMTP, X-Priority header)

Demonstrates how to send high-priorty email (or lower priority email) by setting the X-Priority header field.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan;
email: TChilkatEmail;
success: Integer;

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

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

// Set the SMTP server (obviously, use your SMTP server, not chilkatsoft.com)
mailman.SmtpHost := 'smtp.chilkatsoft.com';

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

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

email.Subject := 'This is a test';
email.Body := 'This is a test';
email.From := 'Chilkat Support <support@chilkatsoft.com>';
success := email.AddTo('Chilkat Admin','admin@chilkatsoft.com');
// To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

// To send high-priority email, 
// add the X-Priority header field with the value "1" 
// to indicate highest-priority.
// A value of "3" is normal, which is the same as not setting
// the X-Priority header at all, and "5" is the lowest. 
// "2" and "4" are in-betweens.

// Microsoft Outlook might add the following headers when
// sending high-priority email.

// X-Priority: 1 (Highest) 
// X-MSMail-Priority: High 
// Importance: High 

// The X-Priority header alone is enough to make the email high-priority.

email.AddHeaderField('X-Priority','1');

// 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.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

success := mailman.CloseSmtpConnection();
if (success <> 1) then
  begin
    Memo1.Lines.Add('Connection to SMTP server not closed cleanly.');
  end;

Memo1.Lines.Add('Mail Sent!');
end;