how to get account name in outlook

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.NET

hi,

I want to send mail in windows mobile application ,
my code is,

private void btnsubmit_Click(object sender, EventArgs e)
        {
            try
            {
                OutlookSession ol = new OutlookSession();
                EmailMessage em = new EmailMessage();
                em.To.Add(new Recipient("iyal", "iyalarasi.r@winxsolutions.com"));
                em.Subject = "Request For Leave";
                em.BodyText = txteno.Text + "request" + cb1.SelectedItem.ToString() + "leave for" + txtreason.Text;
               // EmailAccount ea = ol.EmailAccounts[0];
                em.Send("iyalarasi");//outlook Account Name
                MessagingApplication.Synchronize("iyalarasi");
                MessageBox.Show("mail sent");
                Form2 f2 = new Form2();
                f2.Show();
                f2.lblmsg.Text = "You have Applied Leave";
            }
            catch (PocketOutlookException ex)
            {
                lblmsg1.Text = ex.ToString();
            }
            catch (Exception e1)
            {
                lblmsg1.Text = e1.ToString();
            }
          }

It show error Incorrect Account name,
I checked with google also.What is Account name in Outlook it is username or name visible in mail?

Please help me.

Need to finish this task soon.