string query="INSERT INTO insert(email,name) values ('" + textBox1.Text + "', '" + textBox2.Text + "')";
you have a table called 'insert' ? really ?? that's bad practice - as you can see by the error, the sql statement parser doesn't like it !!!
create a table with a different name eg email_raw and try the SQL again, eg
string query="INSERT INTO email_raw(email,name) values ('" + textBox1.Text + "', '" + textBox2.Text + "')";
btw, putting SQL together like that is also a bad idea, but lets get it going before we cover that