程序static void Main(string[] args)
        {
            var aaa = Send("mossadmin@xxx.com", "120182056@qq.com", "邮件主题", true, "内容2222", "127.0.0.1", "mossadmin", "pass");
    /// </summary>
    /// <param name="from">发送人邮件地址</param>
    /// <param name="to">接收人邮件地址</param>
    /// <param name="subject">邮件主题</param>
    /// <param name="isBodyHtml">是否是Html</param>
    /// <param name="body">邮件体</param>
    /// <param name="smtpHost">SMTP服务器地址</param>
    /// <param name="userName">用户名</param>
    /// <param name="password">密码</param>
    /// <returns>是否成功</returns>
        }
        public static bool Send(string from, string to, string subject, bool isBodyHtml, string body, string smtpHost, string userName, string password)
        {
            string[] ts = to.Split(',');
            bool isSuccess = true;
            foreach (string t in ts)
            {
                try
                {
                    MailMessage mm = new MailMessage();
                    mm.From = new MailAddress(from);
                    mm.To.Add(new MailAddress(t.Trim()));
                    mm.Subject = subject;
                    mm.IsBodyHtml = isBodyHtml;
                    mm.Body = body;
                    SmtpClient sc = new SmtpClient();
                    sc.Host = smtpHost;
                    sc.Port = 25;
                    sc.UseDefaultCredentials = true;//winform中不受影响，asp.net中，false表示不发送身份严正信息
                    //smtpClient.EnableSsl = true;//如果服务器不支持ssl则报，服务器不支持安全连接 错误
                    sc.Credentials = new System.Net.NetworkCredential(userName, password);
                    sc.DeliveryMethod = SmtpDeliveryMethod.Network;
                    sc.Send(mm);
                }
                catch (Exception exception)
                {

                    Console.WriteLine(exception);
                }
            }
            return isSuccess;
        }