Using a .cer Certificate File for Encrypted Email

Sends an encrypted email using the recipient's digital certificate from a .cer file.

Download Chilkat Email ActiveX for POP3 / SMTP

Download Chilkat IMAP ActiveX

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan2;
success: Integer;
cert: TChilkatCert;
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.comcast.net';

//  Load the .cer file into a certificate object:
cert := TChilkatCert.Create(Self);
success := cert.LoadFromFile('comodoChilkat.cer');
if (success <> 1) then
  begin
    ShowMessage(cert.LastErrorText);

  end;

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

email.Subject := 'This email is encrypted';
email.Body := 'This is a digitally encrypted mail';
email.From := 'Chilkat Support <support@chilkatsoft.com>';
email.AddTo('Comodo Test','comodo@chilkatsoft.com');

//  Indicate that the email is to be sent encrypted.
email.SendEncrypted := 1;

//  Specify the certificate:
success := email.SetEncryptCert(cert);
if (success <> 1) then
  begin
    ShowMessage(email.LastErrorText);

  end;

success := mailman.SendEmail(email);
if (success <> 1) then
  begin
    ShowMessage(mailman.LastErrorText);
  end
else
  begin
    ShowMessage('Mail Sent!');
  end;
end;