avoid flooding logs if the email sending failed

AppServer/LocationThread.cs

@@ -22,6 +22,7 @@ namespace AppServer
         private volatile DBsubsOperationManager dbsubsoperManage;
         private volatile DBvehiclesManager dbvehs;
         private DBvehiclesManager DBvehInfo;
+        List<string> blackListAddress = new List<string>();
 
         public static volatile Int32 LocationCheckQueuesCount = 0;
         Int64 count = 0;
@@ -410,6 +411,12 @@ namespace AppServer
 
             if (Program.cfg.enableEmailService && !String.IsNullOrEmpty(Program.cfg.emailAddress) && !String.IsNullOrEmpty(mailAdr))
             {
+                if (blackListAddress.Contains(mailAdr))
+                {
+                    Utils.WriteLine($" sendMailGeo : The email was not sent. Email address '{mailAdr}' is in blacklist ");
+                    return;
+                }
+
                 try
                 {
                     MailAddress from = new MailAddress(Program.cfg.emailAddress);
@@ -433,7 +440,10 @@ namespace AppServer
                 }
                 catch (Exception ex)
                 {
-                    Console.WriteLine("Exception in sendMailGeo: ", ex.ToString());
+                    if (ex.ToString().Contains("timed out"))
+                        blackListAddress.Add(mailAdr);
+
+                    Utils.WriteLine($"Exception in sendMailGeo: {ex.ToString()}");
                 }
             }
             else
@@ -447,6 +457,13 @@ namespace AppServer
         {
             if (Program.cfg.enableEmailService && !String.IsNullOrEmpty(Program.cfg.emailAddress) && !String.IsNullOrEmpty(mailAdr))
             {
+
+                if (blackListAddress.Contains(mailAdr))
+                {
+                    Utils.WriteLine($" sendAlarmMail : The email was not sent. Email address '{mailAdr}' is in blacklist ");
+                    return;
+                }
+
                 try
                 {
                     MailAddress from = new MailAddress(Program.cfg.emailAddress);
@@ -458,6 +475,9 @@ namespace AppServer
                 }
                 catch (Exception ex)
                 {
+                    if (ex.ToString().Contains("timed out"))
+                        blackListAddress.Add(mailAdr);
+
                     Utils.WriteLine("Exception in sendMailAlarm2: {0}" + ex.ToString(), ConsoleColor.Red);
                 }
             }

AppServer/MulticastListener.cs

@@ -28,6 +28,8 @@ namespace AppServer
         private DBvehiclesManager dbvehs;
         internal DBsubsOperationManager dbsubsoperManage;
         private DBcallPatchManager dbCallPatch;
+        private List<string> blackListAddress = new List<string>();
+
         #region code for zone 
         private volatile static ArrayList ZoneList = new ArrayList();
         private volatile static ArrayList LandList = new ArrayList();
@@ -2150,6 +2152,13 @@ namespace AppServer
 
         private void sendAlarmMail(string mes, string mailAdr)
         {
+
+            if (blackListAddress.Contains(mailAdr))
+            {
+                Utils.WriteLine($" sendAlarmMail : The email was not sent. Email address '{mailAdr}' is in blacklist ");
+                return;
+            }
+
             try
             {
                 MailAddress from = new MailAddress(Program.cfg.emailAddress);
@@ -2161,11 +2170,16 @@ namespace AppServer
             }
             catch (Exception ex)
             {
+                if (ex.ToString().Contains("timed out"))
+                    blackListAddress.Add(mailAdr);
+
                 Utils.WriteLine("Exception in sendMailAlarm: " + ex.ToString(), ConsoleColor.Red);
                 //Console.WriteLine(e.ToString());
             }
         }
 
+    
+
     public void sendDailyReportMail(String PdfFile, string mailAdr)
         {
             try