SMTPMailer smtpMailer = new SMTPMailer(); public string SMTPServer = ConfigurationSettings.AppSettings["SMTPServer"]; public string SMTPUser = ConfigurationSettings.AppSettings["SMTPUser"]; public string SMTPNotifyAddress = ConfigurationSettings.AppSettings["SMTPNotifyAddress"]; public string SMTPPassword = ConfigurationSettings.AppSettings["SMTPPassword"]; protected void ButtonSend_Click(object sender, EventArgs e) { string mailbody = "Email from :" + TextBoxFirstName.Text.TrimEnd() + " " + TextBoxLastName.Text.TrimEnd() + Environment.NewLine; mailbody += "Company: " + TextBoxCompany.Text.TrimEnd() + Environment.NewLine; mailbody += "State: " + DropDownListStates.SelectedValue + Environment.NewLine; LabelMailStatus.Text = smtpMailer.SendMailMessasge(SMTPNotifyAddress, TextBoxEmail.Text.TrimEnd(), "Test Send Subject", SMTPServer, SMTPUser,SMTPPassword,"", mailbody); }