(Delphi ActiveX) Rename Email Attachments After Adding

Demonstrates how to rename email attachments after adding but before sending.

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;
contentType: WideString;

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

mailman := TChilkatMailMan.Create(Self);

mailman.SmtpHost := 'smtp.my-mail-server.com';
mailman.SmtpUsername := 'MY_SMTP_USERNAME';
mailman.SmtpPassword := 'MY_SMTP_PASSWORD';
mailman.SmtpSsl := 1;
mailman.SmtpPort := 465;

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.

// Add some attachments.
// The AddFileAttachment method returns the value of the content-type it chose for the attachment.
contentType := email.AddFileAttachment('qa_data/jpg/starfish.jpg');
if (email.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(email.LastErrorText);
    Exit;
  end;
contentType := email.AddFileAttachment('qa_data/pdf/fishing.pdf');
if (email.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(email.LastErrorText);
    Exit;
  end;

// If we save the email to a .eml, we can examine in a text editor.
success := email.SaveEml('qa_output/e1.eml');
if (success = 0) then
  begin
    Memo1.Lines.Add(email.LastErrorText);
    Memo1.Lines.Add('Failed to save .eml');
    Exit;
  end;

// We see the following in the e1.eml
// Notice that Chilkat replaced the full path with just the filename.
// The full local path is not part of the email that gets sent..

// ...
// --------------020807050607070004010609
// Content-Type: image/jpeg; name="starfish.jpg"
// Content-Transfer-Encoding: base64
// Content-Disposition: attachment; filename="starfish.jpg"
// 
// ...
// --------------020807050607070004010609
// Content-Type: application/pdf; name="fishing.pdf"
// Content-Transfer-Encoding: base64
// Content-Disposition: attachment; filename="fishing.pdf"
// ...

// Before sending, each filename can be changed within the email object.
// For example:
success := email.SetAttachmentFilename(0,'orange_starfish.jpg');
success := email.SetAttachmentFilename(1,'tuna_fishing.pdf');

// Look at the new MIME source of the email in a  text editor...
success := email.SaveEml('qa_output/e2.eml');
if (success = 0) then
  begin
    Memo1.Lines.Add(email.LastErrorText);
    Memo1.Lines.Add('Failed to save .eml');
    Exit;
  end;

// You'll see this:

// ...
// --------------020807050607070004010609
// Content-Type: image/jpeg; name="orange_starfish.jpg"
// Content-Transfer-Encoding: base64
// Content-Disposition: attachment; filename="orange_starfish.jpg"
// 
// ...
// --------------020807050607070004010609
// Content-Type: application/pdf; name="tuna_fishing.pdf"
// Content-Transfer-Encoding: base64
// Content-Disposition: attachment; filename="tuna_fishing.pdf"
// ...

// Send the email with the updated filenames..
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 with attachments sent!');
end;