Delphi - Send HTML email with embedded images¶

The following delphi example codes demonstrate how to send HTML email with embedded images.

To attach an embedded images to email, you should add an attachment to email at first. Then you should assign an unique identifier(contentid) to this attachment. Finally, you need to replace the <img src="your file name" /> to <img src="cid:yourcontentid" />.

Sections:

Installation
Add reference
Delphi - Send HTML email with embedded images - example
TLS 1.2 protocol
32bit/x64 ActiveX DLL
Distribution

Installation¶

EASendMail is a SMTP component which supports all operations of SMTP/ESMTP protocols (RFC 821, RFC 822, RFC 2554). Before you can use the following example codes, you should download the EASendMail Installer and install it on your machine at first.

Add reference¶

To use EASendMail SMTP ActiveX Object in your Delphi project, the first step is “Add Unit file of EASendMail to your project”. Please go to C:\Program Files\EASendMail\Include\delphi or C:\Program Files (x86)\EASendMail\Include\delphi folder, find EASendMailObjLib_TLB.pas, and then copy this file to your project folder.

unit Unit1;

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

You can also create “EASendMailObjLib_TLB.pas” manually like this:

Delphi 7

Please choose menu -> Project -> Import Type Library and select EASendMailObj ActiveX Object, click Create Unit, the reference of EASendMail ActiveX Object will be added to your project.
Delphi XE

If you use Delphi XE to import the Type library, Please choose menu -> Component -> Import Component -> Import Type Library -> and select EASendMailObj ActiveX Object -> have Generate Component Wrapper checked -> Create Unit.

Then you can start to use it in your Delphi Project.

Delphi - Send HTML email with embedded images - example¶

The following example codes demonstrate sending email with embedded images. In order to run it correctly, please change SMTP server, user, password, sender, recipient value to yours.

Note

To get full sample projects, please download and install EASendMail on your machine.

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

    // 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 := 'test HTML email from Delphi with embedded images';

    // Add embedded image and return the unique identifier of the attachment
    cid := oSmtp.AddInline('c:\test.jpg');
    If cid = '' Then
    Begin
    ShowMessage('Failed to add embedded image with error: ' +
        oSmtp.GetLastErrDescription());
        exit;
    End;

    // Set HTML body format
    oSmtp.BodyFormat := 1;

    // Set HTML body
    oSmtp.BodyText := '<html><body>Hello, this is an embedded <img src="cid:' +
    cid + '"> picture.</body></html>';

    // 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.

To attach embedded images/pictures, ImportMailEx and ImportHtml methods are strongly recommended. With these methods, you don’t have to specify the ContentID manually. The html source/file html body can be imported to email with embedded pictures automatically.

You can also refer to the htmlmail.* samples in EASendMail Installer. Those samples demonstrate how to build a HTML email editor and send HTML email with attachment or embedded images/pictures.

TLS 1.2 protocol¶

TLS is the successor of SSL, more and more SMTP servers require TLS 1.2 encryption now.

If your operating system is Windows XP/Vista/Windows 7/Windows 2003/2008/2008 R2/2012/2012 R2, you need to enable TLS 1.2 protocol in your operating system like this:

Enable TLS 1.2 on Windows XP/Vista/7/10/Windows 2008/2008 R2/2012

32bit/x64 ActiveX DLL¶

Seperate builds of run-time dll for 32 and x64 platform

File	Platform
Installation Path\Lib\native\x86\EASendMailObj.dll	32 bit
Installation Path\Lib\native\x64\EASendMailObj.dll	64 bit

Distribution¶

Standard EXE

For VB6, C++, Delphi or other standard exe application, you can distribute EASendMailObj.dll with your application to target machine without COM-registration and installer. To learn more detail, please have a look at Registration-free COM with Manifest File.
Script

For ASP, VBScript, VBA, MS SQL Stored Procedure, you need to install EASendMail on target machine by EASendMail installer, both 32bit/x64 DLL are installed and registered.

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