private void BtnConnect_Click(object sender, EventArgs e)
        {
            string cm_status = "notstarted";
            bool success = false;

            if (CbType.Text == "IMAP")
            {
                using (Chilkat.Imap imap = new Chilkat.Imap())
                {
                    success = imap.UnlockComponent("Anything for 30-day trial");
                    if (success == true)
                    {
                        imap.KeepSessionLog = true;
                        imap.ConnectTimeout = 30;
                        imap.ReadTimeout = 30;

                        imap.Port = Convert.ToInt32(NudPort.Value);
                        imap.Ssl = Convert.ToBoolean(CbSSL.Text);

                        success = imap.Connect(TbServer.Text);
                        if (success == true)
                        {
                            success = imap.Login(TbMail.Text, TbPassword.Text);
                            if (success == true)
                            {
                                cm_status = "good_mail";
                            }
                            else
                            {
                                if (TbServer.Text == "imap.gmail.com")
                                {
                                    if (imap.SessionLog.Contains("Please log in via your web browser") || imap.SessionLog.Contains("Application-specific password required"))
                                    {
                                        cm_status = "blocked_mail";
                                    }
                                    else
                                    {
                                        cm_status = "bad_mail";
                                    }
                                }
                                else if (TbServer.Text == "imap.mail.ru")
                                {
                                    if (imap.SessionLog.Contains("Please verify your account"))
                                    {
                                        cm_status = "blocked_mail";
                                    }
                                    else
                                    {
                                        cm_status = "bad_mail";
                                    }
                                }
                                else
                                {
                                    cm_status = "bad_mail";
                                }
                            }
                            imap.Disconnect();
                        }
                        else
                        {
                            if (imap.LastErrorText.Contains("Failed to connect"))
                            {
                                cm_status = "bad_proxy";
                            }
                            else
                            {
                                cm_status = "error";
                            }
                        }
                        Console.WriteLine(imap.SessionLog);
                    }
                    else
                    {
                        cm_status = "error";
                    }
                    Console.WriteLine(imap.LastErrorText);
                }
            }
            else if (CbType.Text == "POP3")
            {
                using (Chilkat.MailMan pop3 = new Chilkat.MailMan())
                {
                    success = pop3.UnlockComponent("Anything for 30-day trial");
                    if (success == true)
                    {
                        pop3.ConnectTimeout = 30;
                        pop3.ReadTimeout = 30;

                        pop3.MailHost = TbServer.Text;
                        pop3.MailPort = Convert.ToInt32(NudPort.Value);
                        pop3.PopSsl = Convert.ToBoolean(CbSSL.Text);

                        pop3.PopUsername = TbMail.Text;
                        pop3.PopPassword = TbPassword.Text;

                        success = pop3.Pop3Connect();
                        if (success == true)
                        {
                            success = pop3.Pop3Authenticate();
                            if (success == true)
                            {
                                cm_status = "good_mail";
                            }
                            else
                            {
                                if (TbServer.Text == "pop.gmail.com")
                                {
                                    if (pop3.Pop3SessionLog.Contains("Web login required") || pop3.Pop3SessionLog.Contains("Application-specific password required"))
                                    {
                                        cm_status = "blocked_mail";
                                    }
                                    else
                                    {
                                        cm_status = "bad_mail";
                                    }
                                }
                                else
                                {
                                    cm_status = "bad_mail";
                                }
                            }
                            pop3.Pop3EndSession();
                        }
                        else
                        {
                            if (pop3.LastErrorText.Contains("Failed to connect"))
                            {
                                cm_status = "bad_proxy";
                            }
                            else
                            {
                                cm_status = "error";
                            }
                        }
                        Console.WriteLine(pop3.Pop3SessionLog);
                    }
                    else
                    {
                        cm_status = "error";
                    }
                    Console.WriteLine(pop3.LastErrorText);
                }
            }
            Console.WriteLine(cm_status);
        }