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 = 0; 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 = 0; 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 > 0)        {          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;      }    }