vs2005 邮件发送代码

/**//// <summary>
        /// 发送系统邮件
        /// </summary>
        /// <param name="email">收件人</param>
        /// <param name="body">内容</param>
        /// <param name="subject">标题</param>
        /// <param name="cc">抄送人</param>
        /// <returns></returns>
        public static bool SendM(MailAddressCollection email, string body, string subject, MailAddressCollection cc)
        ...{
            //try
            //{
                if (email != null && email.Count > 0)
                ...{
                    System.Net.Mail.MailMessage mm = new System.Net.Mail.MailMessage();
                    //mm.From = "webservice@*****.***";
                    
                    mm.IsBodyHtml = true;
                    mm.Body = body;

                    foreach (MailAddress m in email)
                        mm.To.Add(m);
                    if (cc != null && cc.Count > 0)
                    ...{
                        foreach (MailAddress s in cc)
                            mm.CC.Add(s);
                    }
                    mm.Priority = System.Net.Mail.MailPriority.High;

                    mm.Subject = subject;
                    System.Net.Mail.SmtpClient sc = new SmtpClient();
                    //sc.Host = "mail.pypo.net";
                    sc.Send(mm);
                    return true;
                }
                else
                    return false;
            //}
            //catch
            //{
            //    return false;
            //}
        }

 在webconfig设置

  <system.net>
    <mailSettings>
      <smtp from="****@*****.***" >
        <network host="mailhost" port="25" userName="webservice" password="*******"/>
      </smtp>
    </mailSettings>
  </system.net>

另，要注意SMTP的设置，SMTP属性->访问->中继权限，最好选择“仅以下列表除外”（也可以选择“仅以下列表” 自己添加允许的列表）