Problems with email freezing and constantly asking for authentication

Ongoing issue with eM Client errors [Password required Server says "[UNAVAILABLE] Account is temporarily unavailable.]  The username and password are correct.  I’m using 7.0.27943.0 eM Client. If I ‘Ignore all’ in the Operations Errors window, it moves on, but just keeps repeating. 

It has also started freezing regularly.  Twice this morning I have had to close it down with task manager and wait for it to do a database check (still working through the second one).  Both times I have been trying to preview an attachment; first time one that I was attaching to an email and second time one that was received.  I frequently have long delays when dealing with attachments.  I have used the emclient took to create a file whilst it was frozen:
MailClient 7.0.27943.0 [PID: 20248]Description:             eM Client
Company:                 eM Client s.r.o.
CPU:                     0%
CPU Time:                0:0:43
Physical Memory:         186856k
Virtual Memory:          734360k
Managed Heap:            0k
Gen 0 Collections:       0
Gen 1 Collections:       0
Gen 2 Collections:       0
% Time in GC:            0.00%

Thread ID: 19764 
Thread ID: 16976 
Thread ID: 16680 
Thread ID: 19724 [waiting]
Thread ID: 13208 [waiting]
Thread ID: 18828 
Thread ID: 15128 
Thread ID: 17532 [waiting]
Thread ID: 12268 [waiting]
Thread ID: 20188 [waiting]
Thread ID: 15456 [waiting]
Thread ID: 10480 [waiting]
Thread ID: 19576 [waiting]
Thread ID: 18352 [waiting]
Thread ID: 18884 
Thread ID: 8420 
Thread ID: 18788 [waiting]
Thread ID: 16608 [waiting]
Thread ID: 18516 [waiting]
Thread ID: 9932 [waiting]
Thread ID: 8012 [waiting]
Thread ID: 4188 [waiting]
Thread ID: 16660 

Thread [#19764]
    [Internal Frame, ‘M–>U’]
    [IL Method without Metadata]
*0. MailClient.exe#0!MailClient.UI.ShellInterop.OpenItem(filename=) (source line information unavailable)
1. MailClient.exe#0!MailClient.UI.UIUtils.OpenFile(filename=“C:\Users\Practice\AppData\Local\Temp\eM Client temporary files\qwl0vbey\032817ab.jpg”) (source line information unavailable)
2. MailClient.exe#0!MailClient.UI.Mail.CommonOperations.OpenAttachment(attachment=) (source line information unavailable)
3. MailClient.exe#0!MailClient.UI.Forms.BalloonForms.FormBalloonAttachmentDetail.toolStripLookButtonOpen_ButtonClicked(sender=, e=) (source line information unavailable)
4. System.Windows.Forms.dll#0!System.Windows.Forms.Control.OnClick(e=) (source line information unavailable)
5. MailClient.Common.UI.dll#0!MailClient.Common.UI.Controls.ControlToolStrip.ControlToolStripButton.PerformClick() (source line information unavailable)
6. MailClient.Common.UI.dll#0!MailClient.Common.UI.Controls.ControlToolStrip.ControlToolStripButton.OnMouseUp(e=System.Windows.Forms.MouseEventArgs) (source line information unavailable)
7. System.Windows.Forms.dll#0!System.Windows.Forms.Control.WmMouseUp(m=, button=, clicks=) (source line information unavailable)
8. System.Windows.Forms.dll#0!System.Windows.Forms.Control.WndProc(m=) (source line information unavailable)
9. System.Windows.Forms.dll#0!System.Windows.Forms.ScrollableControl.WndProc(m=) (source line information unavailable)
10. System.Windows.Forms.dll#0!System.Windows.Forms.ContainerControl.WndProc(m=) (source line information unavailable)
11. System.Windows.Forms.dll#0!System.Windows.Forms.UserControl.WndProc(m=) (source line information unavailable)
12. System.Windows.Forms.dll#0!System.Windows.Forms.Control+ControlNativeWindow.OnMessage(m=) (source line information unavailable)
13. System.Windows.Forms.dll#0!System.Windows.Forms.Control+ControlNativeWindow.WndProc(m=) (source line information unavailable)
14. System.Windows.Forms.dll#0!System.Windows.Forms.NativeWindow.DebuggableCallback(hWnd=, msg=514, wparam=, lparam=) (source line information unavailable)
[Internal Frame, ‘M–>U’]
[IL Method without Metadata]
15. System.Windows.Forms.dll#0!System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(dwComponentID=, reason=-1, pvLoopData=0) (source line information unavailable)
16. System.Windows.Forms.dll#0!System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(reason=-1, context=System.Windows.Forms.ApplicationContext) (source line information unavailable)
17. System.Windows.Forms.dll#0!System.Windows.Forms.Application+ThreadContext.RunMessageLoop(reason=, context=) (source line information unavailable)
18. MailClient.exe#0!MailClient.Program+<>c.b__62_3() (source line information unavailable)
[Internal Frame, ‘U–>M’]
19. mscorlib.dll#0!System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(obj=, parameters=, arguments=) (source line information unavailable)
20. mscorlib.dll#0!System.Delegate.DynamicInvokeImpl(args=) (source line information unavailable)
21. System.Windows.Forms.dll#0!System.Windows.Forms.Control.InvokeMarshaledCallbackDo(tme=) (source line information unavailable)
22. System.Windows.Forms.dll#0!System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(obj=) (source line information unavailable)
23. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
24. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
25. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
26. System.Windows.Forms.dll#0!System.Windows.Forms.Control.InvokeMarshaledCallback(tme=) (source line information unavailable)
27. System.Windows.Forms.dll#0!System.Windows.Forms.Control.InvokeMarshaledCallbacks() (source line information unavailable)
28. System.Windows.Forms.dll#0!System.Windows.Forms.Control.WndProc(m=) (source line information unavailable)
29. System.Windows.Forms.dll#0!System.Windows.Forms.ScrollableControl.WndProc(m=) (source line information unavailable)
30. System.Windows.Forms.dll#0!System.Windows.Forms.Form.WndProc(m=) (source line information unavailable)
31. MailClient.Common.UI.dll#0!MailClient.Common.UI.Forms.BaseForm.WndProc(m=) (source line information unavailable)
32. System.Windows.Forms.dll#0!System.Windows.Forms.Control+ControlNativeWindow.OnMessage(m=) (source line information unavailable)
33. System.Windows.Forms.dll#0!System.Windows.Forms.Control+ControlNativeWindow.WndProc(m=) (source line information unavailable)
34. System.Windows.Forms.dll#0!System.Windows.Forms.NativeWindow.DebuggableCallback(hWnd=, msg=49738, wparam=, lparam=) (source line information unavailable)
[Internal Frame, ‘M–>U’]
[IL Method without Metadata]
35. MailClient.exe#0!MailClient.Program+<>c.b__62_2() (source line information unavailable)
36. MailClient.ExceptionUtils.dll#0!MailClient.ExceptionUtils.ExceptionUtils.Filter(body=, filter=MailClient.ExceptionUtils.ExceptionUtils+FilterDelegate, handler=System.Action`1<system.exception>) (source line information unavailable)
37. MailClient.exe#0!MailClient.Program.Main(args=) (source line information unavailable)

Thread [#16976]
[Internal Frame, ‘U–>M’]

Thread [#16680]

Thread [#19724]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Storage.dll#0!MailClient.Storage.Data.Compactor.CompactWorker(parameter=) (source line information unavailable)
2. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#13208]
*0. mscorlib.dll#0!System.Threading.Monitor.Wait(obj=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Accounts.dll#0!MailClient.Storage.Application.TaskQueue.<.ctor>b__4_0() (source line information unavailable)
2. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart() (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#18828]

Thread [#15128]
[Internal Frame, ‘M–>U’]
[IL Method without Metadata]
*0. System.Runtime.Remoting.dll#0!System.Runtime.Remoting.Channels.Ipc.IpcPort.WaitForConnect() (source line information unavailable)
1. System.Runtime.Remoting.dll#0!System.Runtime.Remoting.Channels.Ipc.IpcServerChannel.Listen() (source line information unavailable)
2. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart() (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#17532]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.IdleWait(waitHandles=) (source line information unavailable)
2. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.ThreadWorker(threadData=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
7. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#12268]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.IdleWait(waitHandles=) (source line information unavailable)
2. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.ThreadWorker(threadData=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
7. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#20188]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.IdleWait(waitHandles=) (source line information unavailable)
2. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.ThreadWorker(threadData=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
7. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#15456]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.IdleWait(waitHandles=) (source line information unavailable)
2. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.ThreadWorker(threadData=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
7. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#10480]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.IdleWait(waitHandles=) (source line information unavailable)
2. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.ThreadWorker(threadData=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
7. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#19576]
*0. mscorlib.dll#0!System.Threading.WaitHandle.WaitAny(waitHandles=, millisecondsTimeout=, exitContext=) (source line information unavailable)
1. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.IdleWait(waitHandles=) (source line information unavailable)
2. MailClient.Commands.dll#0!MailClient.Commands.SynchronizationQueue.ThreadWorker(threadData=) (source line information unavailable)
3. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
4. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
5. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
6. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
7. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart(obj=) (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#18352]
*0. mscorlib.dll#0!System.Threading.WaitHandle.InternalWaitOne(waitableSafeHandle=, millisecondsTimeout=, hasThreadAffinity=, exitContext=) (source line information unavailable)
1. mscorlib.dll#0!System.Threading.WaitHandle.WaitOne(millisecondsTimeout=, exitContext=) (source line information unavailable)
2. System.Windows.Forms.dll#0!System.Windows.Forms.Control.WaitForWaitHandle(waitHandle=System.Threading.ManualResetEvent) (source line information unavailable)
3. System.Windows.Forms.dll#0!System.Windows.Forms.Control.MarshaledInvoke(caller=, method=, args=, synchronous=) (source line information unavailable)
4. System.Windows.Forms.dll#0!System.Windows.Forms.Control.Invoke(method=, args=) (source line information unavailable)
5. System.Windows.Forms.dll#0!System.Windows.Forms.Control.Invoke(method=) (source line information unavailable)
6. MailClient.Common.UI.dll#0!MailClient.Common.UI.Marshalling.SafeInvoke(control=, method=, parameters=) (source line information unavailable)
7. MailClient.exe#0!MailClient.UI.Notifications.Notifier.checkQueue() (source line information unavailable)
8. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
9. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
10. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=, preserveSyncCtx=) (source line information unavailable)
11. mscorlib.dll#0!System.Threading.ExecutionContext.Run(executionContext=, callback=, state=) (source line information unavailable)
12. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart() (source line information unavailable)
[Internal Frame, ‘U–>M’]

Thread [#18884]

Thread [#8420]
[Internal Frame, ‘M–>U’]
[IL Method without Metadata]
*0. System.dll#0!System.Net.Sockets.Socket.Receive(buffer=array [16416], offset=0, size=, socketFlags=System.Net.Sockets.SocketFlags, errorCode=System.Net.Sockets.SocketError) (source line information unavailable)
1. System.dll#0!System.Net.Sockets.Socket.Receive(buffer=, offset=, size=, socketFlags=) (source line information unavailable)
2. System.dll#0!System.Net.Sockets.NetworkStream.Read(buffer=, offset=, size=) (source line information unavailable)
3. System.dll#0!System.Net.FixedSizeReader.ReadPacket(buffer=array [16416], offset=0, count=5) (source line information unavailable)
4. System.dll#0!System.Net.Security._SslStream.StartFrameHeader(buffer=array [4096], offset=0, count=4096, asyncRequest=) (source line information unavailable)
5. System.dll#0!System.Net.Security._SslStream.StartReading(buffer=array [4096], offset=0, count=4096, asyncRequest=) (source line information unavailable)
6. System.dll#0!System.Net.Security._SslStream.ProcessRead(buffer=, offset=, count=, asyncRequest=) (source line information unavailable)
7. System.dll#0!System.Net.Security.SslStream.Read(buffer=, offset=, count=) (source line information unavailable)
8. mscorlib.dll#0!System.IO.BufferedStream.ReadByte() (source line information unavailable)
9. MailClient.Imap.Base.dll#0!MailClient.Utils.UnbufferedTextReader.ReadLine() (source line information unavailable)
10. MailClient.Imap.Base.dll#0!MailClient.Imap.Base.Connection.ReceiveWorker() (source line information unavailable)
11. mscorlib.dll#0!System.Threading.ThreadHelper.ThreadStart_Context(state=) (source line information unavailable)
12. mscorlib.dll#0!System.Threading.ExecutionContext.RunInternal(executionContext=, callback=, state=, preserveSyncCtx=</.ctor></system.exception>