Delphi - DomainKeys and DKIM signature¶

unit Unit1;

interface
// include EASendMailObjLib_TLB unit to your Delphi Project
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, EASendMailObjLib_TLB, StdCtrls;

Unit Unit1;

Interface

Uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls, EASendMailObjLib_TLB; // add EASendMail Unit

Type
    TForm1 = Class(TForm)
        Button1: TButton;
        Procedure Button1Click(Sender: TObject);
    private
        { Private declarations }
    public
        { Public declarations }
    End;

const
  ConnectNormal = 0;
  ConnectSSLAuto = 1;
  ConnectSTARTTLS = 2;
  ConnectDirectSSL = 3;
  ConnectTryTLS = 4;

Var
    Form1: TForm1;

Implementation

{$R *.dfm}

Procedure TForm1.Button1Click(Sender: TObject);
Var
    oSmtp : TMail;
    dkimConfig: TDkimConfig;
Begin
    dkimConfig := TDkimConfig.Create(Application);
    // Load DomainKeys and DKIM configuration file
    if not dkimConfig.LoadFromFile('d:\my folder\emailarchitect.net.json') then
        begin
            ShowMessage('failed to load dkim configuration file');
            exit;
        end;

    oSmtp := TMail.Create(Application);
    oSmtp.LicenseCode := 'TryIt';

    // Assign DkimConfig object to Smtp Mail
    oSmtp.DkimSignerConfig := dkimConfig.DefaultInterface;

    // Set your sender email address
    oSmtp.FromAddr := 'test@emailarchitect.net';

    // Add recipient email address
    oSmtp.AddRecipientEx('support@emailarchitect.net', 0);

    // Set email subject
    oSmtp.Subject := 'simple email from Delphi with DKIM signature';

    // Set email body
    oSmtp.BodyText := 'this is a test email sent from Delphi project, do not reply';

    // Your SMTP server address
    oSmtp.ServerAddr := 'smtp.emailarchitect.net';

    // User and password for ESMTP authentication, if your server doesn't require
    // user authentication, please remove the following codes
    oSmtp.UserName := 'test@emailarchitect.net';
    oSmtp.Password := 'testpassword';

    // ConnectTryTLS means if server supports SSL/TLS connection, SSL/TLS is used automatically
    oSmtp.ConnectType := ConnectTryTLS;

    // If your server uses 587 port
    // oSmtp.ServerPort := 587;

    // If your server uses 25/587/465 port with SSL/TLS
    // oSmtp.ConnectType := ConnectSSLAuto;
    // oSmtp.ServerPort := 587; // 25 or 587 or 465

    ShowMessage('start to send email ...');

    If oSmtp.SendMail() = 0 Then
        ShowMessage('email was sent successfully!')
    Else
        ShowMessage('failed to send email with the following error: '
        + oSmtp.GetLastErrDescription());

End;

End.