Exchange 2010 periodically stops responding to SMTP events with error 421 4.4.1 Connection timed out

Question

EDIT: Fixed :) Thanks!

I'm trying to make a login code and I'm having a bit of trouble at the login function. I need to check which line a username is located in, within a text file. Is it possible? If not is there another way around this?

EDIT: added code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
class Program
{

    static void Main(string[] args)
    {
        int loginAttempt = 0;

        using (System.IO.StreamWriter file = new System.IO.StreamWriter("C:\\Users\\Public\\Usernames.txt", true))
        {
            file.WriteLine();
        }

        int userType = 0;
        string retrievedUsername = String.Empty;

        using (System.IO.StreamReader fileUsername = new System.IO.StreamReader("C:\\Users\\Public\\Usernames.txt"))
        {
            retrievedUsername = fileUsername.ReadToEnd();
        }



        Console.ForegroundColor = ConsoleColor.Magenta;
            Console.WriteLine("Please note that this is a prototype, passwords are not hashed/encrypted ^_^. Report any bugs / flaws with this to [email protected], If I get any spam I will high five you in the face with a chair");
            Console.ForegroundColor = ConsoleColor.Green; 
        Console.WriteLine("Welcome to the meData service! Ver. 0.01 Beta, made by mechron");
        do
        {
            Console.WriteLine("Please enter login below or type register to register a new account on this device");
            string loginUsername = Console.ReadLine();
            if (loginUsername == "login")
            {

                Console.WriteLine("Type in your username");
                string loginUser = Console.ReadLine();

            }
            else
            {
                if (loginUsername == "register")
                {
                    int registerAttempt = 0;

                    Console.WriteLine("Choose your username!");
                    string registerUsername = Console.ReadLine();

                    bool containUser = System.IO.File.ReadAllLines("C:\\Users\\Public\\Usernames.txt").Contains(registerUsername);
                    if (containUser == true) { Console.WriteLine("Error, username already exists! Please try again!"); } else { registerAttempt = 1; }


                    if( registerAttempt == 1 ) 
                   {
                    using (System.IO.StreamWriter files = new System.IO.StreamWriter("C:\\Users\\Public\\Usernames.txt", true))
                    {
                        files.WriteLine(registerUsername);
                    }

                   }
                    if (registerAttempt == 1)
                    {
                        Console.WriteLine("Now choose your password!");
                        string loginPass = Console.ReadLine();
                        using (System.IO.StreamWriter files = new System.IO.StreamWriter("C:\\Users\\Public\\Passwords.txt", true))
                        {
                            files.WriteLine(loginPass);
                        }
                        Console.WriteLine("Good! Now you will be returned to the start screen! Try to login there!");
                    }
                }
                else
                {
                    Console.WriteLine("Error, command not recognized. Try again");
                }


            }
        } while ( loginAttempt == 0 );

Solution

thanks Michael did some research could be related to resource usage, have added some extra memory to teh VM will see if it fixes it. here is a link with some info for anyone else having the same issue http://technet.microsoft.com/en-us/library/bb201658.aspx

Comments

[chris d]

getting exactly the same issue on one of my servers, has anyone found a solution for this yet

[Michael Shimmins]

No - I decided it was a better use of my time to move to hosted exchange. Couple of months now and no noticeable downtime, wonderful.

[Sudhakar Tillapudi]

do you want the line no?

[musefan]

It would help if you could include a sample of your code which you use for finding the string, then we can suggest how to adapt that to get the line number

[Jon]

You say "the line I found a string in" -- well, how exactly did you find the string? Where is the code? Also, it's highly unlikely that you care about the line number. Perhaps you care about something else that is related to the line number? What is that?

[mechron]

Sorry if I was unclear, I wanted to see if I could find which line a string was in a text file. If that wasn't possible was there another way see whether a username matches a password.

[Lorenz Meyer]

You are storing plain usernames and passwords in a text file ?! You really should look for another method of authentication.