引用命名空间：

using System.Net.Mail;

/// 

/// 发送HTML邮件，有抄送和密送

/// 需要在Web.config文件中的system.net下的mailSettings节点进行配置

/// 

/// 收件人地址

/// 抄送地址

/// 密送地址

/// 邮件主题

/// 邮件正文

public static void SendMail(string mailto, string mailcc, string mailbcc, string mailsubject, string mailbody)

{

MailMessage mMessage = new MailMessage();

MailAddress mTo = new MailAddress(mailto);

if (mailcc != "") { MailAddress mCC = new MailAddress(mailcc); mMessage.CC.Add(mCC); }

if (mailbcc != "") { MailAddress mBCC = new MailAddress(mailbcc); mMessage.Bcc.Add(mBCC); }

mMessage.To.Add(mTo);

mMessage.Subject = mailsubject;

//正文和主题的字符编码都设置为UTF8

mMessage.SubjectEncoding = System.Text.Encoding.UTF8;

mMessage.BodyEncoding = System.Text.Encoding.UTF8;

mMessage.Body = mailbody;

//正文支持html

mMessage.IsBodyHtml = true;

SmtpClient client = new SmtpClient();

client.Send(mMessage);

} 调用：

SendMail("11111111@qq.com", "", "", "testdata", "
hello
");