C#发送邮箱实现代码

public static class EmailHelper
  {
    /// <summary>
    /// 发送邮件
    /// </summary>
    /// <param name="subject">邮件主题</param>
    /// <param name="msg">邮件内容</param>
    /// <param name="filePath">附件地址，如果不添加附件传null或""</param>
    /// <param name="senderEmail">发送人邮箱地址</param>
    /// <param name="senderPwd">发送人邮箱密码</param>
    /// <param name="recipientEmail">接收人邮箱</param>
    public static void SendMail(string subject, string msg, string filePath, string senderEmail, string senderPwd, params string[] recipientEmail)
    {
      if (!CheckIsNotEmptyOrNull(subject, msg, senderEmail, senderPwd) || recipientEmail == null || recipientEmail.Length == 0)
      {
        throw new Exception("输入信息无效");
      }
      try
      {
        string[] sendFromUser = senderEmail.Split('@');

        //构造一个Email的Message对象
        MailMessage message = new MailMessage();

        //确定smtp服务器地址。实例化一个Smtp客户端
        System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("smtp." + sendFromUser[1]);

        //构造发件人地址对象
        message.From = new MailAddress(senderEmail, sendFromUser[0], Encoding.UTF8);

        //构造收件人地址对象
        foreach (string userName in recipientEmail)
        {
          message.To.Add(new MailAddress(userName, userName.Split('@')[0], Encoding.UTF8));
        }

        if (!string.IsNullOrEmpty(filePath))
        {
          Attachment attach = new Attachment(filePath);
          //得到文件的信息
          ContentDisposition disposition = attach.ContentDisposition;
          disposition.CreationDate = System.IO.File.GetCreationTime(filePath);
          disposition.ModificationDate = System.IO.File.GetLastWriteTime(filePath);
          disposition.ReadDate = System.IO.File.GetLastAccessTime(filePath);
          //向邮件添加附件
          message.Attachments.Add(attach);
        }

        //添加邮件主题和内容
        message.Subject = subject;
        message.SubjectEncoding = Encoding.UTF8;
        message.Body = msg;
        message.BodyEncoding = Encoding.UTF8;

        //设置邮件的信息
        client.DeliveryMethod = SmtpDeliveryMethod.Network;
        message.BodyEncoding = System.Text.Encoding.UTF8;
        message.IsBodyHtml = false;

        //如果服务器支持安全连接，则将安全连接设为true。
        //gmail,qq支持，163不支持
        switch (sendFromUser[1])
        {
          case "gmail.com":
          case "qq.com":
            client.EnableSsl = true;
            break;
          default:
            client.EnableSsl = false;
            break;
        }

        //设置用户名和密码。
        client.UseDefaultCredentials = false;
        //用户登陆信息
        NetworkCredential myCredentials = new NetworkCredential(senderEmail, senderPwd);
        client.Credentials = myCredentials;
        //发送邮件
        client.Send(message);
      }
      catch (Exception ex)
      {
        throw (ex);
      }
    }

    /// <summary>
    /// 验证所有传入字符串不能为空或null
    /// </summary>
    /// <param name="ps">参数列表</param>
    /// <returns>都不为空或null返回true，否则返回false</returns>
    public static bool CheckIsNotEmptyOrNull(params string[] ps)
    {
      if (ps != null)
      {
        foreach (string item in ps)
        {
          if (string.IsNullOrEmpty(item)) return false;
        }
        return true;
      }
      return false;
    }
  }