A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

using (var imapClient = new ImapClient(host, userName, passWord, ImapClient.AuthMethods.Login, 993, true))
              {
                  if (type == "inbox")
                  {
                      imapClient.SelectMailbox("INBOX");
                  }
                  else if (type == "draft")
                  {
                      imapClient.SelectMailbox("[Gmail]/Drafts");
                  }
                  else if (type == "sent")
                  {
                      imapClient.SelectMailbox("[Gmail]/Sent Mail");
                  }
                  else if (type == "spam")
                  {
                      imapClient.SelectMailbox("[Gmail]/Spam");
                  }
                  else if (type == "trash")
                  {
                      imapClient.SelectMailbox("[Gmail]/Trash");
                  }
                  messages = new List<MailMessage>(imapClient.GetMessageCount());
                  int Msgcount = imapClient.GetMessageCount();
                  AllMsgCount = Msgcount;

                  if (Msgcount < NoRows)
                  {
                      messages = imapClient.GetMessages(0, Msgcount, false, seenUnseen).ToList();

                  }
                  else
                  {
                      if (lastMsgCount == 0)
                      {
                          lastMsgCount = 20;
                      }
                      lastMsgCount = Msgcount - lastMsgCount;
                      if (Msgcount >= 0)
                      {
                          if (tmpnorows > 0)
                          {
                              messages = imapClient.GetMessages(Msgcount, Msgcount + tmpnorows, false, seenUnseen).ToList();
                          }
                          else
                          {
                              messages = imapClient.GetMessages(Msgcount, Msgcount - 10, false, seenUnseen).ToList(); ;
                          }
                          //messages = imapClient.GetMessages(Msgcount, Msgcount - 20, false, seenUnseen)..Where(m => !m.Flags.HasFlag(Flags.Seen) && !m.Flags.HasFlag(Flags.Deleted)).ToList();

                      }
                  }