I'm not sure about accessing outlook, but if you're using an exchange server and developing in .NET 2.0 you can use system.net.mail. Somethiing like this, we use it for internal web applications and it works very well:

MailAddress to = new MailAddress("to@you.com");
MailAddress from = new MailAddress("to@you.com");

//build the email message(subject,body)
MailMessage mail = new MailMessage(to, from);
mail.Subject = "";
mail.Body = "";

//set the smtpclinet and send the email
SmtpClient launcher = new SmtpClient("nameofserver",25);
launcher.Send(mail);