.net 发送Email 单发 群发

   把该引用的命名空间引用上，就能直接用了，单发短信已测试，群发未测试。

    /// <summary>
    /// 单发Email

    /// </summary>
    /// <param name="from">发信人地址</param>
    /// <param name="to">收信人地址</param>
    /// <param name="title">标题</param>
    /// <param name="body">内容</param>
    /// <returns></returns>
    public static  string sendEmail(string to, string title, string body)
    {
        try
        {
            MailMessage m_message = new MailMessage();

            m_message.From = new MailAddress("*@126.com");

            m_message.To.Add(new MailAddress(to));

            m_message.Subject = title;

            m_message.Body = body;

            SmtpClient m_smtpClient = createClient();

            m_smtpClient.Send(m_message);
            return "发送成功";
        }
        catch (Exception e)
        {
            return e.Message;
        }
    }

    /// <summary>
    /// 群发Email

    /// </summary>
    /// <param name="from">发信人地址</param>
    /// <param name="to">收信人地址列表</param>
    /// <param name="title">标题</param>
    /// <param name="body">内容</param>
    /// <returns></returns>
    public static  string sendEmail(string[] to, string title, string body)
    {
        try
        {
            MailMessage m_message = new MailMessage();

            m_message.From = new MailAddress("*@126.com");

           foreach (string s in to)
            {
                m_message.To.Add(new MailAddress(s));
            }

            m_message.Subject = title;

            m_message.Body = body;

            SmtpClient m_smtpClient =createClient();

            m_smtpClient.Send(m_message);
            return "发送成功";
        }
        catch (Exception e)
        {
            return e.Message;
        }
    }

    public static  SmtpClient createClient()
    {
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.126.com";
        smtp.Port = 25;

        smtp.UseDefaultCredentials = true;//不能和帐号顺序颠倒，否则出错。
        smtp.Credentials = new System.Net.NetworkCredential("*@126.com", "******");
        return smtp;
    }