Send email using SMTP STARTTLS.

Send email using SMTP STARTTLS. With STARTTLS, the SMTP client connects to the SMTP server on port 25 (non-SSL) and then issues a STARTTLS command to convert the connection to a secure TLS channel.

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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');

  end;

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

mailman.SmtpUsername := 'myLogin';
mailman.SmtpPassword := 'myPassword';

mailman.StartTLS := 1;

//  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');

success := mailman.SendEmail(email As CHILKATMAILLib2_TLB.IChilkatEmail2);
if (success <> 1) then
  begin
    ShowMessage(mailman.LastErrorText);

  end;

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

ShowMessage('Mail Sent!');
end;