using System.Net;

 using System.Net.Mail;

 namespace ClassLibrary

 {

     /// <summary>

     /// 发送邮件

     /// </summary>

     public static class Eail

     {

         #region 发送邮件

         /// <summary>

         /// 发送邮件

         /// </summary>

         /// <param name="toMail">接受邮箱地址</param>

         /// <param name="toName">接受人</param>

         /// <param name="Subject">邮件主题</param>

         /// <param name="Body">邮件内容</param>

         /// <param name="IsBodyHtml">是否是HTMLtrue/false</param>

         /// <param name="Priority">邮件优先级</param>

         public static void SendEail(string toMail, string toName, string Subject, string Body, bool IsBodyHtml = true, MailPriority Priority = MailPriority.Normal)

         {

             SmtpClient client = new SmtpClient();

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

             client.Port = ;//端口号

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

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

             //电子邮件信息类

             MailAddress fromAddress = new MailAddress("@163.com", "");//发件人Email,在邮箱是这样显示的

             MailAddress toAddress = new MailAddress(toMail, toName);//收件人Email,在邮箱是这样显示的

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

             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.Subject = Subject;//主题

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

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

             mailMessage.Priority = MailPriority.Normal;//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).

             client.Send(mailMessage);

         }

         #endregion

     }

 }

 代码