C#发送邮件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;

namespace SendMessage
{
    class SendEmail
    {

        

        /// <summary>
        /// 使用163发送邮箱
        /// </summary>
        public static void SendMial163()
        {
            MailMessage mailMessage = new MailMessage();
            mailMessage.To.Add("to@qq.com");
            mailMessage.From = new System.Net.Mail.MailAddress("form@163.com");
            mailMessage.Subject = "hello world";
            mailMessage.Body = "这是一封用C#发送的邮件";
            mailMessage.IsBodyHtml = true;
            mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
            mailMessage.Priority = System.Net.Mail.MailPriority.Normal;

            SmtpClient smtpClient = new SmtpClient();
            smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, "@form-pwd@");
            smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            smtpClient.Host = "smtp." + mailMessage.From.Host;
            smtpClient.Port = 25;
            smtpClient.Timeout = 3000;
            smtpClient.EnableSsl = false;
            smtpClient.Send(mailMessage);

        }
    

    /// <summary>
    /// 发送GMail
    /// </summary>
    /// <param name="toEmail">客户的邮箱</param>
    /// <param name="FromEmail">我们的邮箱</param>
    /// <param name="pwd">密码</param>
    /// <param name="dispalyName">显示的名称</param>
    /// <param name="subject">标题</param>
    /// <param name="body">内容</param>
    /// <returns></returns>
        public static int SendMailLocalhost(string toEmail,string FromEmail, string pwd,string dispalyName,string subject,string body)
        {
            MailMessage msg = new MailMessage();

            msg.To.Add(toEmail);
          
            /* 
            * msg.To.Add("b@b.com"); 
            * msg.To.Add("b@b.com"); 
            * msg.To.Add("b@b.com");可以发送给多人 
            */
            //msg.CC.Add(c@c.com); 
            /* 
            * msg.CC.Add("c@c.com"); 
            * msg.CC.Add("c@c.com");可以抄送给多人 
            */
            //上面这些可以不用管

            msg.From = new MailAddress(FromEmail, dispalyName, System.Text.Encoding.UTF8);
            /* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/

            msg.Subject = subject;//邮件标题 
            msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码 

            msg.Body = body;//邮件内容 
            msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码 

            msg.IsBodyHtml = true;//是否是HTML邮件 
            msg.Priority = MailPriority.High;//邮件优先级 

            SmtpClient client = new SmtpClient();

            client.UseDefaultCredentials = false;
            client.Credentials = new System.Net.NetworkCredential(FromEmail, pwd);

            //上述写你的GMail邮箱和密码 
            client.Port = 587;//Gmail使用的端口 
            client.Host = "smtp.gmail.com";
            client.EnableSsl = true;//经过ssl加密 

            try
            {
                //client.SendAsync(msg, userState);
                client.Send(msg);
                return 1;
            }
            catch (System.Net.Mail.SmtpException ex)
            {
                return -1;
            }
        }


    }
   
}