This Is How You Can Fix Outlook Error Message 0x8004210B

In today’s era, time is the most precious gem for all of us. Isn’t it?

I know that you will also agree with me.

Everyone wants to do their work fast. Even the organizations want to speed up their work.

Same is the case with any software or application. It either have to be time efficient or will be of no work.

MS Outlook is also one of the important software used by different organizations for its several unique features like,to send and receive emails, managing meetings, notebook, calendar etc.

As we all know that software are prone to corruption and MS Outlook is not an exception. There are many common errors which we face while using MS Outlook. And one such error is Outlook error message 0x8004210B.S
So now the question is”

What is this error?

MS Outlook is the most widely used email application, mainly used for sending and receiving emails. When users try to send or receive email message then sometimes this application shows an outlook error message 0x8004210B.

Error message:

Task ‘’ reported error (0x8004210b): ‘The operation timed out waiting for a response from the sending (SMTP) server. If you continue to receive this message contact your server administrator or Internet Service Provider (ISP).”

You may also read:
Here is How to Fix / Resolve MS Outlook Error 0x800ccc78
Quick Fix For MS Outlook error 0x800ccc0e (A DIY Guide)
(Solved) MS Outlook Data File Cannot Be Accessed / Outlook Error 0x8004010f

This issue or pop up may appear due to the following reasons:

  • Faulty Installation of the program.
  • Improper Windows shutdown or startup.
  • Improper Windows OS installation.
  • PC crash while running the same program
  • System freezes while operating

Reasons or Causes

  • Virus and malware attack
  • Incomplete MS Outlook software installation
  • Deletion of MS Outlook related files etc.
  • Windows registry has corruption from a recent Microsoft outlook related software change.

If you have faced the same error then worry not and try to resolve Microsoft Outlook error 0x8004210B by applying manual method mentioned below:

Manual steps

  • In the first step, try to repair registry entries related with error 0x8004210B.
  • Next, do full malware scan of your system and clean out your system junk with the help of disk clean up tool.
  • After completion of the above step, do update your PC device drivers.
  • Next step is utilizing Windows system restore which is to undo the recent system changes.
  • Next, do uninstall and reinstall the Microsoft Outlook program which is associated with error 0x8004210B.
  • Now, run “sfc / scan now” (it is Windows System File Checker)
  • In this step install all the available Windows updatesà Lastly do perform a clean Windows installation.

The above-given method is complex and time-consuming.

It is also possible that it does not give the desired result.

There are also some users who want an easy and quick solution.

In this scenario, using a third party tool becomes essential and unavoidable.

There are many third party tools available in the market. I will discuss about one such professional tool which I used i.e. Cigati Outlook Email Recovery Tool.

  • It supports recovery of Outlook emails with all its mailbox contents such as contacts, emails, calendars events etc.
  • Effective in recovering deleted emails.
  • Also saves recovered Outlook PST emails into different file formats like- PST, MSG, DBX, MBOX and EML.
  • Supports Outlook PST files recovery of any size.
  • Loaded with advanced search and preview feature.
  • Has a simple GUI and Easy to use application

This professional tool not only saves time and effort but can also fix Outlook error 0x8004210B in Outlook 2016, Outlook 2013, Outlook 2010, Outlook 2007.

There is no such disadvantage except one that it does not work with MAC or Linux.

I downloaded & used its Free version. You can also try it to evaluate this tool, and if you liked then you can upgrade


Outlook error is a serious problem and is needed to be resolved so that the efficient flow of work is not affected. To repair Outlook Error message 0x8004210B, any of the above-mentioned methods can be used by the user as per their wish. I have discussed one such professional tool. You can also share or comment if you know any other method or efficient tool to repair outlook error.

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