Many users choose Outlook for its ease of use and also the fact that it enables access to multiple email accounts from one central UI. The good news is that the issue is minor and there are several easy tricks you can try to fix it. The error message states: As a result, Outlook doesn’t send emails, so let’s see how you can fix that.

How do I fix Outlook error 0x8004210B?

1. Set up a new Outlook account

Error 0x8004210B can be due to a corrupted Outlook account. Apply the above steps in that regard.

2. Repair a corrupted Outlook profile

Alternatively, you could try repairing a corrupted Outlook profile. You can do that from the Accounts Settings window. We covered more in the quick guide that provides further details for fixing corrupted Outlook accounts.

3. Check Outlook’s email settings

4. Delete stuck emails

In more recent Outlook versions, error 0x8004210B can arise due to stuck emails with unsupported attachments. Apply the above steps to correct that easily.

5. Uninstall antivirus software

McAfee, Kaspersky, and other antivirus software might be blocking Outlook from the email server. Uninstalling the software as outlined above might leave some residual files behind. You can uninstall some antivirus software with more specific and thorough uninstaller utilities provided by their publishers. So, check if there’s a specific uninstall utility for your antivirus package. SPONSORED If the above resolutions don’t resolve error 0x8004210B for you, you might need to contact your ISP for further support. With countless free color themes to match precisely your style and a minimalist, lightweight design, rest assured that you can’t go wrong when choosing Mailbird. In fact, it isn’t about simply avoiding the error 0x8004210B. Mailbird also integrates perfectly with other applications that you use daily – Dropbox, Twitter, Evernote, Facebook – you name them. ⇒ Get Mailbird The Microsoft Support and Recovery Assistant for Outlook might also provide a fix for the issue. Click Download on the Microsoft Support and Recovery Assistant page to try that utility out. Need a better email client? If so, just check out these email clients that support multiple accounts. If you’re not ready for such a change, we also have a Troubleshooting Outlook Hub waiting for you. Let us know which of our methods helped you with your Outlook issue. Do so by leaving us a message in the comments section below.

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