C# 使用smtp发送邮件

//简单邮件传输协议类

            System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();

            client.Host = "smtp.163.com";//邮件服务器

            client.Port = 25;//smtp主机上的端口号,默认是25.

            client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;//邮件发送方式:通过网络发送到SMTP服务器

            client.Credentials = new System.Net.NetworkCredential("panthervic", "123456");//凭证,发件人登录邮箱的用户名和密码



            //电子邮件信息类

            System.Net.Mail.MailAddress fromAddress = new System.Net.Mail.MailAddress("[email protected]", "小明");//发件人Email,在邮箱是这样显示的,[发件人:小明<[email protected]>;]

            System.Net.Mail.MailAddress toAddress = new System.Net.Mail.MailAddress("[email protected]", "小红");//收件人Email,在邮箱是这样显示的, [收件人:小红<[email protected]>;]

            System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage(fromAddress, toAddress);//创建一个电子邮件类

            mailMessage.Subject = "邮件的主题";

            string filePath = Server.MapPath("/index.html");//邮件的内容可以是一个html文本.

            System.IO.StreamReader read = new System.IO.StreamReader(filePath, System.Text.Encoding.GetEncoding("GB2312"));

            string mailBody = read.ReadToEnd();

            read.Close();

            mailMessage.Body = mailBody;//可为html格式文本

            //mailMessage.Body = "邮件的内容";//可为html格式文本

            mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;//邮件主题编码

            mailMessage.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");//邮件内容编码

            mailMessage.IsBodyHtml = true;//邮件内容是否为html格式

            mailMessage.Priority = System.Net.Mail.MailPriority.High;//邮件的优先级,有三个值:高(在邮件主题前有一个红色感叹号,表示紧急),低(在邮件主题前有一个蓝色向下箭头,表示缓慢),正常(无显示).

            try

            {

                client.Send(mailMessage);//发送邮件

                //client.SendAsync(mailMessage, "ojb");异步方法发送邮件,不会阻塞线程.

            }

            catch (Exception)

            {

            }