ENCOUNTERED THE ERROR WHEN I ADDED HTML TABLE TO OUTGOING MAIL..
"<html><table><tr><td><b>Sender Name: </b></td>" & "<td><b>" & txtName.Text & "</b></td></tr>" & "<tr><td><b>Sender Email:</b></td>" & "<td><b>" & txtMail.Text & "</b></td></tr>" & "<tr><td><b>MESSAGE:</B></TD>" & "<TD><B>" & DropDownList1.SelectedItem & " </B></TD></TR>" & "<tr><td><b>ISSUE: </b></td>" & "<td><b>" & txtMessage.Text txtEA.Text & "</b></td></tr>" & "</table></html>" ;