How to Fix Error Code - 0x8004210e?

Looking for ways to fix Outlook error - 0x8004210e? Worried that you can’t access your Outlook mail? The solution is here, in this article, I have explained the best possible way for you guys to fix the Outlook receiving error 0x8004210e. If you want immediate relief from the error, use the Yodot Outlook PST Repair tool.

Written by Lucy John on June 08, 2023

What is Outlook Error 0x8004210e?

The Outlook error 0x8004210e occurs when there is an issue with the configuration of the outgoing mail server (SMTP). It indicates that the recipient's email address is wrong or your mailbox is busy and temporarily unavailable. Below the user on a web host forum has faced the same error 0x8004210e with his outlook. Come let’s understand what causes this Outlook mail error 0x8004210e in the next section.


I can’t seem to login to my email, not sure if I have reached the limit. I can send emails ok but can’t receive them. I’m getting this from Outlook…

Task ‘[email protected] - Receiving’ reported error (0x8004210E): ‘Your mailbox is temporarily unavailable because another e-mail message is being delivered to it or another mail application is accessing it. The server responded: -ERR [IN-USE] Temporary authentication failure.’

Source: Webhost Forum

Table of Contents:

Understanding the Error

How Do I Fix Outlook Error 0x8004210e?

Fix Corrupted Outlook Data File Using the Yodot Outlook PST Repair tool

Additional Tips and Considerations


Understanding the Error:

How Do I Fix Outlook Error 0x8004210e?

The outlook send and receive error 0x8004210e may be caused by Outlook data file corruption. So, I suggest you guys use a professional Outlook PST Repair tool like Yodot to repair the corrupted Outlook data file that lead to a temporary mailbox Outlook issue.


Fix Corrupted Outlook Data File Using the Yodot Outlook PST Repair tool

The Yodot Outlook PST Repair tool will help you to repair corrupt Outlook data files with its advanced repair methodology. You can even repair severely corrupted Outlook data files using the tool. Download and try the tool now for free.

Step-by-step process to use the tool:

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