pop3 server doesn't respond

cwellsleadville · January 18, 2021, 1:42pm

error message: POP3 server connection fails

Version 8.1.979

after applying the most recent update on 1/14/20 pop3 connection fails. It is not the server it still works with my iphone. SMTP connection shows ok in diagnostics.

I tried the diagnostics and fix but it still fails after fix

Error log
7:53:29 AM Online state: changed to online due to NetworkAvailability
7:53:29 AM [email protected] POP3 Connecting: To [email protected]
7:53:59 AM [email protected] [POP3] MailClient.Accounts.SocketException: Connection failed due to the following reason:
“Unable to read data from the transport connection: 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…”
at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Connect(WorkerStatus status)
at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Execute(WorkerStatus status)
at MailClient.Commands.Command.Process(WorkerStatus status)
EnqueuedStackTrace =
at MailClient.Protocols.Pop3.Pop3Account.<>c__DisplayClass7_0.b__0()
at MailClient.Protocols.Common.AccountBase.RunIfOnline(Action actionIfOnline, Action actionIfOffline)
at MailClient.Protocols.Pop3.Pop3Account.ReceiveAsync(Action1 receivedItem, Action1 completed, CancellationToken cancellationToken)
at MailClient.Accounts.BindingAccountBase.Receive()
at MailClient.Accounts.AccountManager.ReceiveAllInternal()
at MailClient.Accounts.AccountManager.SendAndReceiveAll()
at MailClient.Program.<>c.b__222_0()
at MailClient.Accounts.AccountManager.<>c__DisplayClass82_0.b__0(Object )
at System.Threading.QueueUserWorkItemCallback.<>c.<.cctor>b__6_0(QueueUserWorkItemCallback quwi)
at System.Threading.ExecutionContext.RunForThreadPoolUnsafe[TState](ExecutionContext executionContext, Action1 callback, TState& state) at System.Threading.QueueUserWorkItemCallback.Execute() at System.Threading.ThreadPoolWorkQueue.Dispatch() at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() 8:03:29 AM [email protected] POP3 Connecting: To [email protected] 8:03:59 AM [email protected] [POP3] MailClient.Accounts.SocketException: Connection failed due to the following reason: "Unable to read data from the transport connection: 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.." at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Connect(WorkerStatus status) at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Execute(WorkerStatus status) at MailClient.Commands.Command.Process(WorkerStatus status) EnqueuedStackTrace = at MailClient.Protocols.Pop3.Pop3Account.<>c__DisplayClass7_0.<ReceiveAsync>b__0() at MailClient.Protocols.Common.AccountBase.RunIfOnline(Action actionIfOnline, Action actionIfOffline) at MailClient.Protocols.Pop3.Pop3Account.ReceiveAsync(Action1 receivedItem, Action1 completed, CancellationToken cancellationToken) at MailClient.Accounts.BindingAccountBase.Receive() at MailClient.Accounts.AccountManager.ReceiveAllInternal() at MailClient.Accounts.AccountManager.SendAndReceiveAll() at MailClient.Accounts.AccountManager.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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(ApplicationContext context) at MailClient.Program.<>c.<Main>b__167_1() at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Delegate.DynamicInvokeImpl(Object[] args) at System.Delegate.DynamicInvoke(Object[] args) 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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at Xilium.CefGlue.Interop.libcef.run_message_loop() at MailClient.Program.Main(String[] args) 8:13:29 AM [email protected] POP3 Connecting: To [email protected] 8:13:59 AM [email protected] [POP3] MailClient.Accounts.SocketException: Connection failed due to the following reason: "Unable to read data from the transport connection: 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.." at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Connect(WorkerStatus status) at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Execute(WorkerStatus status) at MailClient.Commands.Command.Process(WorkerStatus status) EnqueuedStackTrace = at MailClient.Protocols.Pop3.Pop3Account.<>c__DisplayClass7_0.<ReceiveAsync>b__0() at MailClient.Protocols.Common.AccountBase.RunIfOnline(Action actionIfOnline, Action actionIfOffline) at MailClient.Protocols.Pop3.Pop3Account.ReceiveAsync(Action1 receivedItem, Action1 completed, CancellationToken cancellationToken) at MailClient.Accounts.BindingAccountBase.Receive() at MailClient.Accounts.AccountManager.ReceiveAllInternal() at MailClient.Accounts.AccountManager.SendAndReceiveAll() at MailClient.Accounts.AccountManager.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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(ApplicationContext context) at MailClient.Program.<>c.<Main>b__167_1() at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Delegate.DynamicInvokeImpl(Object[] args) at System.Delegate.DynamicInvoke(Object[] args) 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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at Xilium.CefGlue.Interop.libcef.run_message_loop() at MailClient.Program.Main(String[] args) 8:23:29 AM [email protected] POP3 Connecting: To [email protected] 8:23:59 AM [email protected] [POP3] MailClient.Accounts.SocketException: Connection failed due to the following reason: "Unable to read data from the transport connection: 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.." at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Connect(WorkerStatus status) at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Execute(WorkerStatus status) at MailClient.Commands.Command.Process(WorkerStatus status) EnqueuedStackTrace = at MailClient.Protocols.Pop3.Pop3Account.<>c__DisplayClass7_0.<ReceiveAsync>b__0() at MailClient.Protocols.Common.AccountBase.RunIfOnline(Action actionIfOnline, Action actionIfOffline) at MailClient.Protocols.Pop3.Pop3Account.ReceiveAsync(Action1 receivedItem, Action`1 completed, CancellationToken cancellationToken)
at MailClient.Accounts.BindingAccountBase.Receive()
at MailClient.Accounts.AccountManager.ReceiveAllInternal()
at MailClient.Accounts.AccountManager.SendAndReceiveAll()
at MailClient.Accounts.AccountManager.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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.RunDialog(Form form)
at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
at MailClient.UI.Forms.formAbout.Present(IWin32Window owner)
at MailClient.UI.Forms.formMain.menuItem_Help_About_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.ToolStripDropDown.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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at MailClient.Program.<>c.b__167_1()
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Delegate.DynamicInvoke(Object[] args)
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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at Xilium.CefGlue.Interop.libcef.run_message_loop()
at MailClient.Program.Main(String[] args)

sunriseal · January 18, 2021, 2:20pm

I am sure there will be other suggestions, but in the interim try disabling your anti-virus software.

cwellsleadville · January 18, 2021, 3:08pm

I had done that it didn’t help

Gary · January 18, 2021, 3:10pm

I think it unlikely that your iPhone is using POP3. Normally it would use IMAP, which is a different port.

But Al’s recommendation of disabling the anti-virus (completely) is a good first step to discovering what is wrong.

sunriseal · January 18, 2021, 3:13pm

I have occasionally encountered a problem with VPN servers causing problems like this. Connecting to a different server will almost always resolve the problem…

cwellsleadville · January 18, 2021, 11:29pm

The phone also uses IMAP. the mail server doesn’t support IMAP

cwellsleadville · January 18, 2021, 11:30pm

The phone uses POP3 not Imap

Gary · January 19, 2021, 8:15am

In eM Client go to Menu > Accounts. Click on the POP3 tab for your account and make sure the port and security policy are one of these specific combinations:

Port 995 = Use SSL/TLS on special port (legacy)
Port 110 = Use SSL/TLS if available

cwellsleadville · January 19, 2021, 2:34pm

account settings are correct.

Gary · January 19, 2021, 2:47pm

Can you completely disable your anti-virus/firewall or VPN and try again.

cwellsleadville · January 19, 2021, 4:03pm

I just applied the most recent Windows update and after the restart when I opened eM client it worked perfectly. Quickly establishing a POP3 connection and downloading 5 days of messages. Thanks to all that offered suggestions.