C#

class Program
    {
        private const string DOMAIN = "foobar.com";
        private const string SMTPHOST = "mail." + DOMAIN;
        private const string FROM = "chadwick.posey@" + DOMAIN;
        private const string TO = FROM;

        static void Main(string[] args)
        {
            MailMessage msg = new MailMessage(FROM, TO, "Subject", "Body");
            
            string path = Path.GetTempPath();
            string name = "AAAAAA_AAAAAAAAAAAA_AAAAAAA_AAAA - IIIIIII CCCCCCCCCC DD IIIIIIÁIIII_20111018_091327.pptx";
            
            File.WriteAllText(path + "\\" + name, "blah");
            Attachment att = new Attachment(path + "\\" + name, new ContentType("application/vnd.openxmlformats-officedocument.presentationml.presentation"));

            msg.Attachments.Add(att);

            SmtpClient client = new SmtpClient(SMTPHOST, 25);
            client.Send(msg);
        }
    }