private static string SendEmail(string message, string subject, string[] mailTo)
 {
     try {
         var host = ConfigurationManager.AppSettings["smtp"];
         var login = ConfigurationManager.AppSettings["user"];
         var password = ConfigurationManager.AppSettings["password"];
         var from = ConfigurationManager.AppSettings["from"];
         var mailSmtp = new MailSmtp(host, login, password);
         mailSmtp.SendMail(from, mailTo, subject, message);
         return "OK";
     } catch (Exception ex) {
         return "<span class=\"error\"><img src=\"/img/error.png\"/>" + ex.Message + "</span>";
     }
 }
 private static string SendEmail(string message, string subject, string client)
 {
     try {
         var host = ConfigurationManager.AppSettings["smtp"];
         var login = ConfigurationManager.AppSettings["user"];
         var password = ConfigurationManager.AppSettings["password"];
         var from = ConfigurationManager.AppSettings["from"];
         var mailSmtp = new MailSmtp(host, login, password);
         var mailList = new List<string>();
         if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["emailEmpresa1"]))
             mailList.Add(ConfigurationManager.AppSettings["emailEmpresa1"]);
         if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["emailEmpresa2"]))
             mailList.Add(ConfigurationManager.AppSettings["emailEmpresa2"]);
         if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["emailEmpresa3"]))
             mailList.Add(ConfigurationManager.AppSettings["emailEmpresa3"]);
         var mailTo = mailList.ToArray();
         mailSmtp.SendMail(from, mailTo, new[] { client }, subject, message);
        return "OK";
     } catch (Exception ex) {
         return "<span class=\"error\"><img src=\"/img/error.png\"/>" + ex.Message + "</span>";
     }
 }