problem when send email

Hello every body

 

I try to send email via asp.net, I use this code

----------------------------CODE---------------------------
MailMessage objMail = new MailMessage();
objMail.From = "fdi@200pip.com";
objMail.To = "fadi_aj@hotmail.com";
objMail.Subject = txtTitle.Text;
objMail.Body = "from: " + txtName.Text + " email: " + txtEmail.Text + " " ...