[IMAP] MailClient.Accounts.ConnectionException:

Hi,
I cannot sync my mail with IMAP. Here is the error log:

12:20:11 [email protected] IMAP 正在同步文件夹列表
12:22:12 [email protected] [IMAP] MailClient.Accounts.ConnectionException: 同步文件夹列表失败,原因如下: 服务器在00:01:00内没有响应
—> System.TimeoutException: 服务器在00:01:00内没有响应
at MailClient.Imap.Base.Extensions.CopyToAsyncWithTimer(Stream source, PipeWriter writer, TimeoutTimer timer, ITaskSource readDemandSource, Action1 loggingCallback, CancellationToken cancellationToken) at MailClient.Imap.Base.TransportPipe.StartReading(Stream stream, CancellationToken token) at System.IO.Pipelines.Pipe.GetReadResult(ReadResult& result) at System.IO.Pipelines.Pipe.GetReadAsyncResult() at System.IO.Pipelines.Pipe.DefaultPipeReader.GetResult(Int16 token) at MailClient.Imap.Base.Extensions.<>c__DisplayClass30_0.<<ReadLineAsync>g__SlowAsyncPath|1>d.MoveNext() --- End of stack trace from previous location --- at MailClient.Imap.Base.Connection.ReceiveAsync() --- End of inner exception stack trace --- at MailClient.Protocols.Imap.ImapActionCommand.ExecuteInternalSync(WorkerStatus status) at MailClient.Protocols.Imap.ImapActionCommand.Execute(WorkerStatus status) at MailClient.Commands.Command.Process(WorkerStatus status) --- End of stack trace from previous location --- at MailClient.Storage.Synchronization.FolderSynchronizerExtensions.SynchronizeSubfoldersAsync(IFolderSynchronizer synchronizer, Folder folder, SynchronizationPriority priority, CancellationToken cancellationToken) at MailClient.Protocols.Imap.ImapAccount.SynchronizeIntAsync(Boolean forced) at MailClient.Protocols.Common.SynchronizableMailAccount.<>c__DisplayClass7_0.<<SynchronizeAsync>b__0>d.MoveNext() IMAP_SERVER_TYPE = Other EnqueuedStackTrace = at MailClient.Protocols.Common.FolderSynchronizer.EnqueueGetFolderList(Folder homeFolder, Action1 completed, Boolean prioritize)
at MailClient.Protocols.Common.FolderSynchronizer.GoOnlinePre()
at MailClient.Protocols.Imap.ImapFolderSynchronizer.GoOnlinePre()
at MailClient.Protocols.Imap.ImapAccount.GoOnlineInt()
at MailClient.Protocols.Common.AccountBase.ChangeOnlineState(Boolean online, OfflineReason offlineReason)
at MailClient.Protocols.Common.AccountBase.GoOnline()
at MailClient.Protocols.Common.AccountBase.RunIfOnline[T](Func1 actionIfOnline, Func1 actionIfOffline)
at MailClient.Protocols.Common.SynchronizableMailAccount.Synchronize(SynchronizationPriority priority)
at MailClient.Accounts.BindingAccountBase.Receive()
at MailClient.Accounts.AccountManager.ReceiveAllInternal(Boolean checkIncludeInGlobalOperations)
at MailClient.Accounts.AccountManager.SendAndReceiveAll(Boolean checkIncludeInGlobalOperations)
at MailClient.Accounts.DesktopAccountManager.timerSendAndReceive_Tick(Object sender, EventArgs e)
at System.Windows.Forms.Timer.OnTick(EventArgs e)
at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, WM msg, IntPtr wparam, IntPtr lparam)
at Interop.User32.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.Interop.Mso.IMsoComponentManager.FPushMessageLoop(UIntPtr dwComponentID, msoloop uReason, Void* pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at MailClient.Program.<>c.b__185_3()
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at MailClient.Common.UI.Forms.BaseForm.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, WM msg, IntPtr wparam, IntPtr lparam)
at Xilium.CefGlue.Interop.libcef.run_message_loop()
at MailClient.Program.Main(String[] args)
GUIStatus_Exception_Reported = True

This mail address is okay I can sync with Thunderbird. No problem.
The diagnostics result is OK.