Send email from SharePoint web part

     protected void Button1_Click(object sender, EventArgs e)
     {
           try
            {
                MailAddress[] ma = { new MailAddress("mail@mail.com") };
                SendEmail(ma, "hello world from C# ", "this is sp");
                SendEmailFromSP("mail@mail.com", "hello subject from SP", "hello body");
            }
            catch (Exception ex)
            { 
                Console.WriteLine(ex.ToString());
            }

        }


        private void SendEmailFromSP(string address, string sub, string bd)
        {
            SPSite site = SPContext.Current.Site; 
            SPWeb thisWeb = site.OpenWeb();
            string toField = address;
            string subject = sub;
            string body = bd;
            bool success = SPUtility.SendEmail(thisWeb, true, true, toField, subject, body);
            Console.WriteLine(success);     
        }

        private void SendEmail(MailAddress[] masTo, string subject, string body)
        {
            using (MailMessage mail = new MailMessage())
            {
                mail.From = new MailAddress(SPContext.Current.Site.WebApplication.OutboundMailSenderAddress);
                foreach (MailAddress ma in masTo)
                    mail.To.Add(ma);
                mail.Subject = subject;
                mail.IsBodyHtml = true;
                mail.Body = body;
                SmtpClient smtp = new SmtpClient(SPContext.Current.Site.WebApplication.OutboundMailServiceInstance.Server.Address);           
                smtp.UseDefaultCredentials = true;  
                smtp.Send(mail);
                Label1.Text = "OK";
            }
        }