Klappt es so ohne Fenster bei Dir?
Delphi-Quellcode:
procedure TForm1.Button2Click(Sender: TObject);
var
Outlook, Mailitem: OLEVariant;
begin
try
Outlook := GetActiveOleObject('Outlook.Application');
except
Outlook := CreateOleObject('Outlook.Application');
end;
MailItem := Outlook.CreateItem(0);
MailItem.Recipients.Add('MaxMuster@mann.de');
MailItem.Subject := 'Delphi-PRAXiS';
MailItem.Body := 'Inhalt';
MailItem.Attachments.Add('C:\TestDatei.txt');
MailItem.Send;
Outlook := Unassigned;
end;