发送邮件

 public  class EmailHelper
    {
        #region 私有字段
        private static bool IsOutlook = false;//是否启用邮件发送功能
        private static bool IsTestEmail = true;//是否测试账号
        private static string MailServer = "";//邮件服务器
        private static string MailAccount = "";//邮件账号
        private static string MailPassword = "";//邮件账号密码
        private static string Mail_suffix = "";//邮件后缀
        #endregion

        #region 构造函数
        public EmailHelper(string IS_OUTLOOK,string IS_ENVIRONMENT,string MAIL_SENDER,string MAIL_ACCOUNT,string MAIL_PASSWORD,string MAIL_SUFFIX)
        {
            IsOutlook = (IS_OUTLOOK == "1") ? true : false;
            IsTestEmail = (IS_ENVIRONMENT == "0") ?true : false;
            MailServer = MAIL_SENDER;
            MailAccount = MAIL_ACCOUNT;
            MailPassword = MAIL_PASSWORD;
            Mail_suffix = MAIL_SUFFIX;       
        }
        #endregion

        #region 邮件发送方法

        /// <summary>
        /// 邮件发送功能
        /// </summary>
        /// <param name="m_strRecipientMail">收件人地址如: pcitzs,请勿加入@GNPJVC.COM.CN, 多个帐号之间请使用 , 或 ; 号隔开</param>
        /// <param name="m_strCC">抄送人地址如: pcitzs,请勿加入@GNPJVC.COM.CN, 多个帐号之间请使用 , 或 ; 号隔开</param>
        /// <param name="m_strarrayMailAttachmentList">附件完整地址</param>
        /// <param name="m_strMailSubject">主题</param>
        /// <param name="m_strMailBody">内容</param>
        /// <returns></returns>
        public bool SendMail(string m_strRecipientMail, string m_strCC, string m_strarrayMailAttachmentList, string m_strMailSubject, string m_strMailBody)
        {
            if (!IsOutlook)
            {
                return true;
            }

            
            string m_strMailServerName = MailServer;
            string adSuffix = Mail_suffix;                   // "@gnpjvc.com.cn";
            string m_strSenderMail = MailAccount + adSuffix;
            string m_lMailUsername = MailAccount;
            string m_lMailUserPassword = MailPassword;

            if (IsTestEmail)
            {
                m_strMailSubject = "[测试邮件]" + m_strMailSubject;
                m_strMailBody = "这是一封测试邮件，抱歉占用您宝贵的时间，此邮件可直接删除，谢谢。<br>" + m_strMailBody;
            }
            //接收者列表
            string[] ArrsToUser, ArrsCCUser;
            ArrsToUser = m_strRecipientMail.Replace(';', ',').Split(',');
            m_strRecipientMail = "";
            for (int i = 0; i < ArrsToUser.Length; i++)
            {
                if (i == ArrsToUser.Length-1)
                {
                    m_strRecipientMail += ArrsToUser[i] + adSuffix;
                }
                else
                {
                    m_strRecipientMail += ArrsToUser[i] + adSuffix + ",";
                }
            }
            //抄送人列表
            ArrsCCUser = m_strCC.Replace(';', ',').Split(',');
            m_strCC = "";
            for (int i = 0; i < ArrsCCUser.Length; i++)
            {
                if (ArrsCCUser[i] != "")
                {
                    if (i == ArrsCCUser.Length - 1)
                    {
                        m_strCC += ArrsCCUser[i] + adSuffix;
                    }
                    else
                    {
                        m_strCC += ArrsCCUser[i] + adSuffix + ",";
                    }
                }
            }

            System.Net.Mail.MailMessage aMessage;
            System.Net.Mail.SmtpClient Client = new SmtpClient();
            if (m_strSenderMail == "" || m_strSenderMail == null)
            {
                return false;
            }
            if (m_strRecipientMail == "" || m_strRecipientMail == null)
            {
                return false;
            }

            //Create a new message
            try
            {
                aMessage = new MailMessage(m_strSenderMail, m_strRecipientMail);
                if (m_strCC != "")
                {
                    aMessage.CC.Add(m_strCC);
                }
                if (m_strMailSubject != null) aMessage.Subject = m_strMailSubject;
                aMessage.BodyEncoding = System.Text.Encoding.UTF8;

                aMessage.IsBodyHtml = true;

                if (m_strMailBody != null) aMessage.Body = m_strMailBody;

                //add the attachment
                if (m_strarrayMailAttachmentList != "")
                {
                    aMessage.Attachments.Add(new System.Net.Mail.Attachment(m_strarrayMailAttachmentList));
                }

                //create a smtpMail

                Client.Host = m_strMailServerName;

                Client.UseDefaultCredentials = false;
                Client.Credentials = new System.Net.NetworkCredential(m_lMailUsername, m_lMailUserPassword, "domain");

            }

            catch (Exception err)
            {
                return false;
            }

            // send email
            try
            {
                Client.Send(aMessage);
                return true;
            }
            catch (Exception err)
            {
                return false;
            }


        }
        #endregion
    }