C# 简单邮件群发通用类

 public static class Email
     {
         /// <summary>
         /// 发件人
         /// </summary>
         public static string mailFrom { get; set; }

         /// <summary>
         /// 收件人
         /// </summary>
         public static string[] mailToArray { get; set; }

         /// <summary>
         /// 抄送
         /// </summary>
         public static string[] mailCcArray { get; set; }

         /// <summary>
         /// 标题
         /// </summary>
         public static string mailSubject { get; set; }

         /// <summary>
         /// 正文
         /// </summary>
         public static string mailBody { get; set; }

         /// <summary>
         /// 发件人密码
         /// </summary>
         public static string mailPwd { get; set; }

         /// <summary>
         /// SMTP邮件服务器
         /// </summary>
         public static string host { get; set; }   

         /// <summary>
         /// 邮件服务器端口
         /// </summary>
         public static int port { get; set; }

         /// <summary>
         /// 正文是否是html格式
         /// </summary>
         public static bool isbodyHtml { get; set; }

         /// <summary>
         /// 附件
         /// </summary>
         public static string[] attachmentsPath { get; set; }

         public static bool Send()
         {
             //使用指定的邮件地址初始化MailAddress实例
             MailAddress maddr = new MailAddress(mailFrom);

             //初始化MailMessage实例
             MailMessage myMail = new MailMessage();

             //向收件人地址集合添加邮件地址
             if (mailToArray != null)
             {
                 for (int i = ; i < mailToArray.Length; i++)
                 {
                     myMail.To.Add(mailToArray[i].ToString());
                 }
             }

             //向抄送收件人地址集合添加邮件地址
             if (mailCcArray != null)
             {
                 for (int i = ; i < mailCcArray.Length; i++)
                 {
                     myMail.CC.Add(mailCcArray[i].ToString());
                 }
             }
             //发件人地址
             myMail.From = maddr;

             //电子邮件的标题
             myMail.Subject = mailSubject;

             //电子邮件的主题内容使用的编码
             myMail.SubjectEncoding = Encoding.UTF8;

             //电子邮件正文
             myMail.Body = mailBody;

             //电子邮件正文的编码
             myMail.BodyEncoding = Encoding.Default;

             //电子邮件优先级
             myMail.Priority = MailPriority.High;

             //电子邮件不是html格式
             myMail.IsBodyHtml = isbodyHtml;

             //在有附件的情况下添加附件
             try
             {
                 if (attachmentsPath != null && attachmentsPath.Length > )
                 {
                     Attachment attachFile = null;
                     foreach (string path in attachmentsPath)
                     {
                         attachFile = new Attachment(path);
                         myMail.Attachments.Add(attachFile);
                     }
                 }
             }
             catch (Exception err)
             {
                 throw new Exception("在添加附件时有错误:" + err.Message);
             }

             SmtpClient client = new SmtpClient();

             //指定发件人的邮件地址和密码以验证发件人身份
             client.Credentials = new NetworkCredential(mailFrom, mailPwd);

             //设置SMTP邮件服务器
             //client.Host = "smtp." + myMail.From.Host;
             client.Host = host;

             //SMTP邮件服务器端口
             client.Port = port;

             //是否使用安全连接
             //client.EnableSsl = true;

             try
             {
                 //将邮件发送到SMTP邮件服务器
                 client.Send(myMail);
                 return true;
             }
             catch (SmtpException ex)
             {
                 string msg = ex.Message;
                 return false;
             }

         }