发送邮件代码

using System.Net.Mail;

　　　　public void SendEmail()
        {
            MailMessage mail = new MailMessage();
            //设置邮件的标题              
            mail.Subject = "EmailTest";
            //设置邮件的发件人             
            mail.From = new MailAddress("HSXsend@163.com", "hsx_send");
            //设置邮件的收件人              
            mail.To.Add(new MailAddress("HSXreceive@163.com", "hsx_receive"));
            //设置邮件的抄送人              
            mail.CC.Add(new MailAddress("kindenough2@163.com", "mail_CC"));
            //设置邮件的内容          
            mail.Body = "就是测试用";
            //设置邮件的格式              
            mail.BodyEncoding = System.Text.Encoding.UTF8;
            mail.IsBodyHtml = true;
            ////设置邮件的发送级别              
            mail.Priority = MailPriority.Normal;
            mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
            SmtpClient client = new SmtpClient();
            //设置用于 SMTP 事务的主机的名称，填IP地址也可以了 http://mail.163.com/         
            //client.Host = "smtp.163.com";
            client.Host = "smtp.126.com";
            //设置用于 SMTP 事务的端口，默认的是 25              
            client.Port = 25;              
            client.UseDefaultCredentials = false;
            client.Credentials = new System.Net.NetworkCredential("HSXsend@163.com", "这里是邮箱密码");
            client.DeliveryMethod = SmtpDeliveryMethod.Network;

            //附件
            string strFilePath = @"C:\test.jpg";
            Attachment at = new Attachment(strFilePath);
            at.Name = System.IO.Path.GetFileName(strFilePath);
            at.NameEncoding = System.Text.Encoding.GetEncoding("gb2312");
            at.TransferEncoding = System.Net.Mime.TransferEncoding.Base64;
            at.ContentDisposition.Inline = true;
            at.ContentDisposition.DispositionType = System.Net.Mime.DispositionTypeNames.Inline;
            string cid = at.ContentId;
            mail.Attachments.Add(at);  

            //都定义完了，正式发送了！            
            client.Send(mail);    
        }